Revision Securing Addition and Subtraction Revisiting addition and
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Objectives Day 1 Y 2: Solve missing number additions and subtractions. Y 3: Revise estimating totals and adding three or four 2 -digit numbers using compact addition. Day 2 Y 2: Place numbers on lines; find the difference between them. Y 3: Use column addition to add three 3 -digit numbers, including money. Day 3 Y 2: Solve addition and subtraction word problems, including money. Y 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. © hamilton-trust. org. uk 1 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Short Mental Workouts Day 1 Add three 1 -digit numbers Day 2 Compare 2 -digit numbers using > and < Day 3 Pairs to 20 p © hamilton-trust. org. uk 2 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Short Mental Workout Add three 1 -digit numbers © hamilton-trust. org. uk 3 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Short Mental Workout Compare 2 -digit numbers using > and < © hamilton-trust. org. uk 4 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Short Mental Workout Pairs to 20 p © hamilton-trust. org. uk 5 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Objectives Day 1 Y 2: Solve missing number additions and subtractions. Y 3: Revise estimating totals and adding three or four 2 -digit numbers using compact addition. © hamilton-trust. org. uk 6 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. 42 + 4 = 46 Talk to your partner. What do you think the hidden number might be? © hamilton-trust. org. uk 7 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. What clues can you spot? 42 + 4 = 46 © hamilton-trust. org. uk 8 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. What clues can you spot? 42 + 4 = 46 The 10 s haven’t changed… © hamilton-trust. org. uk 9 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. What clues can you spot? 42 + 4 = 46 … but the 1 s have © hamilton-trust. org. uk 10 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. 42 + 4 = 46 What do we add to the two 1 s to give six 1 s? © hamilton-trust. org. uk 11 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. The hidden number could have been this number. 42 + 4 = 46 © hamilton-trust. org. uk 12 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. Let’s see how many pegs are under the cloth. How many pegs are here 3 7 © hamilton-trust. org. uk 13 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. thepegs How. Will many bewere do number you think bigger on the coat or hanger smaller 7 than before were 7? Why? taken off? © hamilton-trust. org. uk 10 - 7 = 3 14 Year 2/3
Day 1: Solve missing number additions and subtractions; Revise estimating totals and adding three or four 2 -digit numbers using compact addition. Y 2 - Today’s Top Tip for Tests Check that the number you have put in an empty box works. © hamilton-trust. org. uk Work out the addition or subtraction with your solution for the mystery number and check that you do get the same answer. 15 Year 2/3
© hamilton-trust. org. uk 16 Year 2/3
Day 1: Revise estimating totals and adding three or four 2 -digit numbers using compact addition. We can use expanded or compact addition to find the total of 4 numbers. 46 + 27 + 52 + 17 40 20 50 + 10 20 140 46 27 52 + 17 2 142 6 7 2 140 + 2 = 142 Who can talk us through the expanded method? © hamilton-trust. org. uk Who can talk us through the compact method? 17 Year 2/3
Day 1: Revise estimating totals and adding three or four 2 -digit numbers using compact addition. How can we estimate the 82 + 32 + 47 + 25 answer before adding? We can round each number to the nearest 10! 82 32 47 + 25 1 186 What happens to 25? Agree an estimate with a partner; then use expanded or compact addition to find the total. How close was it to the estimate? © hamilton-trust. org. uk Let’s check the answer using the compact method. 18 Year 2/3
Y 3 Investigation: Adult Sheet © hamilton-trust. org. uk 19 Year 2/3
Y 3 Investigation: Child Sheet © hamilton-trust. org. uk 20 Year 2/3
Challenge © hamilton-trust. org. uk 21 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Objectives Day 2 Y 2: Place numbers on lines; find the difference between them. Y 3: Use column addition to add three 3 -digit numbers, including money. © hamilton-trust. org. uk 22 Year 2/3
Day 2: Place numbers on lines; find the difference between them; Use column addition to add three 3 -digit numbers, including money. 378 + 123 + 285 Who rounded the numbers to the nearest 100? Discuss in pairs – do you they think the answer is more than 1000 or less than 1000? 400 + 100 + 300 is only 800 so it looks like the answer will be less than 1000! © hamilton-trust. org. uk 23 Year 2/3
Day 2: Place numbers on lines; find the difference between them; Use column addition to add three 3 -digit numbers, including money. 378 + 123 + 285 300 100 + 200 100 Y 3 have been learning two ways to solve this – expanded and compact addition. Who can talk us through these? 70 8 20 3 80 5 10 378 123 + 285 11 700 80 6 786 700 + 80 + 6 = 786 © hamilton-trust. org. uk That’s close to our estimate of 800! 24 Year 2/3
Day 2: Place numbers on lines; find the difference between them; Use column addition to add three 3 -digit numbers, including money. We can also add money in the same way. Will £ 3. 55 + £ 2. 26 be more or less than £ 6? Who can talk us through these? £ 3 50 p 5 p + £ 2 20 p 6 p 10 p £ 3. 55 + £ 2. 26 1 £ 5 80 p 1 p £ 5. 81 £ 5 + 80 p + 1 p = £ 5. 81 © hamilton-trust. org. uk 25 Year 2/3
Day 2: Place numbers on lines; find the difference between them; Use column addition to add three 3 -digit numbers, including money. Now let’s try £ 4. 72 + £ 2. 54. Will that be more or less than £ 8? Who can talk us through these? £ 4 70 p 2 p + £ 2 50 p 4 p £ 1 £ 4. 72 + £ 2. 54 1 £ 7 20 p 6 p £ 7. 26 £ 7 + 20 p + 6 p = £ 7. 26 © hamilton-trust. org. uk 26 Year 2/3
Challenge © hamilton-trust. org. uk 27 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 57 Can you mark 72 and 57 on the line? © hamilton-trust. org. uk 72 Ask two children to mark 72 and 57 on the landmarked line. Ask them to explain how they decided where to mark them. 28 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 3 Let’s subtract 57 from 72 using Frog. 57 10 2 72 72 – 57 =15 3 + 10 = 13 + 2 = 15 Ask a volunteer to help Maths frog to calculate this by counting up from 57 to 72. © hamilton-trust. org. uk 29 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 65 84 Can you mark 84 and 65 on the line? Now ask two more children to mark on 84 and 65 on the landmarked line. Ask them to explain how they decided where to mark them. © hamilton-trust. org. uk 30 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 10 5 Let’s subtract 65 from 84 using Frog. 65 4 84 84 – 65 = 19 5 +10 = 15 + 4 =19 Ask a volunteer to help Maths frog to calculate this by counting up from 65 to 84. © hamilton-trust. org. uk 31 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 4 2 58 60 Let’s help Where should Where will his he Frog draw he jump next? he he jump finish? start? first? own line this time. © hamilton-trust. org. uk 64 64 – 58 = 6 2+4=6 32 Year 2/3
Day 2: Place numbers on lines; find the difference between them. 10 4 2 48 50 Let’s help Where should Frog draw will his he And now? first? own line he he jump finish? next? start? again. © hamilton-trust. org. uk 60 64 64 – 48 = 16 2+10 = 12, + 4 = 16 33 Year 2/3
Day 2: Place numbers on lines; find the difference between them. Y 2 - Today’s Top Tip for Tests Look at the Talk to your numbers involved partner. before launching How would you straight into a work out these subtractions? 43 – 8 52 – 46 78 – 20 84 – 31 Take feedback and draw out that sometimes counting back can be the more efficient method to subtract. © hamilton-trust. org. uk 34 Year 2/3
© hamilton-trust. org. uk 35 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Objectives Day 3 Y 2: Solve addition and subtraction word problems, including money. Y 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. © hamilton-trust. org. uk 36 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Chloe has 7 stickers. Zak has 11 stickers. How many more stickers does Zak have than Chloe? © hamilton-trust. org. uk 37 Read this number story and talk to your partner about it. Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Let’s draw a quick sketch to help us decide what to do. Chloe Zak © hamilton-trust. org. uk 38 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. This number story is asking us to find the difference between 7 and 11. Chloe Zak 0 7 11 The gap between 7 and 11 on the number line is 4. © hamilton-trust. org. uk 39 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Read this number story and talk to your partner about it. Chloe has £ 7. Zak has £ 11. How much money do they have altogether? © hamilton-trust. org. uk 40 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Imagine the number story, making a quick sketch if it helps, before deciding what calculation is needed. This time we need to add 7 to 11. Zak Chloe The answer is 18! © hamilton-trust. org. uk 41 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Zak buys a pen for 75 p. He pays the shopkeeper with one pound. Read this number story and talk to your partner about it. How much change does he get? © hamilton-trust. org. uk 42 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. 100 p – 75 p = 25 p Frog be We would need to useful here work out £ 1 to count 75 p. up from 75 p to 100 p. 20 p 5 p 75 p 80 p © hamilton-trust. org. uk 90 p 100 p 43 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Chloe has 45 marbles. She gives Zak 6. Read this number story and talk to your partner about it. How many marbles does she have left? © hamilton-trust. org. uk 44 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. 45 – 6 = 39 We need to find 45 - 6. It is probably better to count back this time. © hamilton-trust. org. uk 45 subtract 5 is 40; subtract 1 more is 39. 45 Year 2/3
Day 3 Solve addition and subtraction word problems, including money. Use column addition to add amounts of money; revise finding change from £ 5, £ 10 and £ 20 using Frog. Y 2 - Today’s Top Tip for Tests Choose a few number stories and share children’s strategies for solving them. Try to imagine the number story. Quickly draw a picture if it helps. © hamilton-trust. org. uk 46 Year 2/3
© hamilton-trust. org. uk 47 Year 2/3
Day 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. Bucket £ 2. 74 Beach Shop Price List Spade £ 1. 43 Beach towel £ 8. 53 Sun cream £ 5. 72 Which two items could you buy for less than £ 5 in total? We can draw a bar model to represent this problem. . . How much would it cost and how much change would you have from £ 5? £ 5 £ 2. 74 Bucket © hamilton-trust. org. uk £ 1. 43 Spade 48 ? Change Year 2/3
Day 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. £ 5 £ 2. 74 Bucket £ 1. 43 Spade 83 p ? Change We can use column addition to find the cost of the bucket and spade… £ 2. 74 + £ 1. 43 1 £ 4. 17 Then count up using Frog to find the change… 3 p £ 4. 17 80 p £ 4. 20 © hamilton-trust. org. uk £ 5 49 Year 2/3
Day 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. Bucket £ 2. 74 Beach Shop Price List Spade £ 1. 43 Beach towel £ 8. 53 Sun cream £ 5. 72 Now find the cost of the sun cream and spade, then the change from £ 10. Draw up a bar model first. © hamilton-trust. org. uk 50 Year 2/3
Day 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. £ 10 £ 5. 72 Sun cream £ 1. 43 Spade ? £ 2. 85 Change £ 5. 72 + £ 1. 43 1 Let’s check. First add the sun cream and spade. £ 7. 15 Then count up using Frog to find the change… 5 p £ 7. 15 £ 7. 20 © hamilton-trust. org. uk 80 p £ 2 £ 8 £ 10 51 Year 2/3
Challenge © hamilton-trust. org. uk 52 Year 2/3
Revision; Securing Addition and Subtraction Revisiting addition and subtraction Well Done! You’ve completed this unit. Objectives Day 1 Y 2: Solve missing number additions and subtractions. Y 3: Revise estimating totals and adding three or four 2 -digit numbers using compact addition. Day 2 Y 2: Place numbers on lines; find the difference between them. Y 3: Use column addition to add three 3 -digit numbers, including money. Day 3 Y 2: Solve addition and subtraction word problems, including money. Y 3: Use column addition to add amounts of money; revise finding the change from £ 5, £ 10 and £ 20 using Frog. © hamilton-trust. org. uk 53 Year 2/3
© hamilton-trust. org. uk 54 Year 2/3
© hamilton-trust. org. uk 55 Year 2/3
© hamilton-trust. org. uk 56 Year 2/3
© hamilton-trust. org. uk 57 Year 2/3
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