Addition and Subtraction Number bonds Addition facts Objectives
Addition and Subtraction Number bonds; Addition facts Objectives Day 1 Pairs to 8. Commutativity. Day 2 Pairs to 9: addition and subtraction. Day 3 Find doubles to double 6. Day 4 Add three numbers, using number bonds to 10 (dice). Day 5 Add three numbers, using number bonds to 10 (digit cards). © hamilton-trust. org. uk 1 Year R/1
Addition and Subtraction Number bonds; Addition facts Objectives Day 1 Pairs to 8. Commutativity. © hamilton-trust. org. uk 2 Year R/1
Day 1: Pairs to 8; commutativity 3+☐ = 8 Look atnumber this Knowing number bonds will help sentence. . . us when we add. Talk to your partner. . . What is the missing number? How will you find out? © hamilton-trust. org. uk 3 Year R/1
Day 1: Pairs to 8; commutativity Did you… …count on from 3 to get to 8? …look at your fingers? …do it a different way? © hamilton-trust. org. uk 4 Year R/1
Day 1: Pairs to 8; commutativity We can also show this addition using cubes. How many more red cubes are needed to make 8? 3+ 5 =8 © hamilton-trust. org. uk 5 Year R/1
Day 1: Pairs to 8; commutativity Think back to the number sentence before. What number should go in the box now? © hamilton-trust. org. uk ☐ =8 3+ 5 5+ 3 6 Year R/1
Day 1: Pairs to 8; commutativity 3 and 5 are ‘special’ number partners that make 8: a number bond. 5 3 Addition can be done in any order because the two parts being added haven’t changed, so must make the same whole. © hamilton-trust. org. uk 3+5=8 5+3=8 7 Year R/1
Day 1: Pairs to 8; commutativity 2 How many more red cubes are needed to make 8? © hamilton-trust. org. uk 8 Year R/1
Day 1: Pairs to 8; commutativity 2+ 6 =8 © hamilton-trust. org. uk Now how many more red cubes are needed to make 8? 9 Year R/1
Day 1: Pairs to 8; commutativity Talk to your partner. Can you find any other pairs of numbers that total 8? Take feedback and ask children to add their number sentence to a large class piece of paper. © hamilton-trust. org. uk 10 Year R/1
Day 1: Pairs to 8; commutativity Use your fingers to help close work your out which Now eyes! number is hidden. Hide one of the numbers with then otherask additions. a. Repeat sticky note children to open their eyes. © hamilton-trust. org. uk 11 Year R/1
© hamilton-trust. org. uk 12 Year R/1
Addition and Subtraction Number bonds; Addition facts Objectives Day 2 Pairs to 9: addition and subtraction. © hamilton-trust. org. uk 13 Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 3+6 7+2 4+5 8+1 © hamilton-trust. org. uk What do all They are all these number bonds to sentences have 9! in common? 14 Year R/1
9+0 3+6 7+2 4+5 8+1 © hamilton-trust. org. uk Remember… Addition can be done in any order because the two parts being added haven’t changed, so must make the same total. Can we find any more number bonds to 9, using these same numbers? 15 Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 0+9 3+6 7+2 4+5 8+1 6+3 2+7 5+4 1+8 © hamilton-trust. org. uk 16 We can use these to help us write subtraction number bonds! Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 0+9 3+6 7+2 4+5 8+1 6+3 2+7 5+4 1+8 © hamilton-trust. org. uk 17 9– 4= Can you use any of these number bonds to help find the missing number? Year R/1
Day 2: Pairs to 9: addition and subtraction. 4 and 5 are Yes! special That partners works. so let’s try that. 9 – 4 =5 Use cubes to demonstrate. © hamilton-trust. org. uk 18 Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 0+9 3+6 7+2 4+5 8+1 6+3 2+7 5+4 1+8 © hamilton-trust. org. uk 19 9– 2= What about this subtraction? Which number bond to 9 contains a 2? Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 0+9 3+6 7+2 4+5 8+1 6+3 2+7 5+4 1+8 © hamilton-trust. org. uk 20 9– 2=7 Complete the number sentence with your partner. Year R/1
Day 2: Pairs to 9: addition and subtraction. 9+0 0+9 3+6 7+2 4+5 8+1 6+3 2+7 5+4 1+8 © hamilton-trust. org. uk 21 Find more subtraction number bonds to 9 with your partner. Year R/1
© hamilton-trust. org. uk 22 Year R/1
Addition and Subtraction Number bonds; Addition facts Objectives Day 3 Find doubles to double 6. © hamilton-trust. org. uk 23 Year R/1
Day 3: Find doubles to double 6. What do you What double haveisto do 3? you when double? © hamilton-trust. org. uk 24 Year R/1
Day 3: Find doubles to double 6. When we double a number, we add it to itself. © hamilton-trust. org. uk 4+4 6+6 7+7 3+3 5+5 25 Year R/1
Day 3: Find doubles to double 6. 1+1 2+2 3+3 4+4 5+5 6+6 With your partner, show double 1, 2, 3, 4, 5, and 6. Use your fingers! Explain that each child should show 1, 2, 3, 4, 5, then 6 fingers. . © hamilton-trust. org. uk 26 Year R/1
Day 3: Find doubles to double 6. Double one is… Double two is… Double three is… Double four is… Double five is… Double six is… © hamilton-trust. org. uk 1+1 2+2 3+3 4+4 5+5 6+6 27 =2 =4 =6 =8 = 10 = 12 Year R/1
Day 3: Find doubles to double 6. 2 6 1 © hamilton-trust. org. uk Choose a child to pick one of the numbers. Repeat for other numbers. 5 3 4 Write the number sentence for double the number called. 28 Year R/1
Challenge © hamilton-trust. org. uk 29 Year R/1
Addition and Subtraction Number bonds; Addition facts Objectives Day 4 Add three numbers, using number bonds to 10 (dice). © hamilton-trust. org. uk 30 Year R/1
Day 1: Add three numbers, using number bonds to 10 (dice). What is the total number of spots on these first two dice? © hamilton-trust. org. uk 10 What is 10 add another 3? 31 13 Year R/1
Day 1: Add three numbers, using number bonds to 10 (dice). Is there an efficient order to do it? 12 How you Whatdid is the add them? total? © hamilton-trust. org. uk 32 Year R/1
Day 1: Add three numbers, using number bonds to 10 (dice). 5 add 5 makes 10, then another 2 makes 12. © hamilton-trust. org. uk Let’s add them now… 33 Year R/1
Day 1: Add three numbers, using number bonds to 10 (dice). Repeat with 5, 2 and 8, then with other trios that always include a pair to 10. What is the total here? now? © hamilton-trust. org. uk 6 +you 4 is see 10, a Can then add pair to the 10? 5! 15 34 Year R/1
Day 1: Add three numbers, using number bonds to 10 (dice). 5 2 8 Write the order you would choose to add these numbers on your whiteboard. © hamilton-trust. org. uk Is there an efficient way to add these? Repeat with other trios of 3 -digit cards that always include a pair to 10. 35 Year R/1
Investigation: Adult Sheet © hamilton-trust. org. uk 36 Year R/1
Investigation: Child Sheet © hamilton-trust. org. uk 37 Year R/1
© hamilton-trust. org. uk 38 Year R/1
Addition and Subtraction Number bonds; Addition facts Objectives Day 5 Add three numbers, using number bonds to 10 (digit cards). © hamilton-trust. org. uk 39 Year R/1
Day 2: Add three numbers, using number bonds to 10 (digit cards). Is there an efficient There isn’tway a Now we need to What double toisto add pair 10, these? but 4? find 8 add 3. there are two 4 s. Shuffle 2 packs of 0 -9 digit cards, then take 4, 3 and 4. 4 © hamilton-trust. org. uk 4 3 40 8 Year 1
Day 2: Add three numbers, using number bonds to 10 (digit cards). +3 8 Where have we landed? © hamilton-trust. org. uk 11 4 + 3 = 11 41 Year 1
Day 2: Add three numbers, using number bonds to 10 (digit cards). Holdtry 3 fingers Now adding up. had 8 by so the We numbers now we add on counting on your 3. . . fingers. … 9, 10, 11 © hamilton-trust. org. uk 42 Year 1
Day 2: Add three numbers, using number bonds to 10 (digit cards). Take out another set of 3 cards. 2 © hamilton-trust. org. uk There isn’taabig pair 9 is quite to 10 or atodouble number count this time. on at the end, so How could wefirst. add let’s put it them? 9 3 43 Year 1
Day 2: Add three numbers, using number bonds to 10 (digit cards). +3 9 +2 14 Where have we landed? 9 + 3 + 2 = 14 © hamilton-trust. org. uk 44 Year 1
Challenge © hamilton-trust. org. uk 45 Year 1
Addition and Subtraction Number bonds; Addition facts Well Done! You’ve completed this unit. Objectives Day 1 Pairs to 8. Commutativity. Day 2 Pairs to 9: addition and subtraction. Day 3 Find doubles to double 6. Day 4 Add three numbers, using number bonds to 10 (dice). Day 5 Add three numbers, using number bonds to 10 (digit cards). © hamilton-trust. org. uk 46 Year R/1
Problem solving and reasoning questions Point at the first number and count on. 5+□ =9 6+□ =8 □+6 □+2 =9 3+□ =8 =9 1+□ =8 9 frogs in the pond. 3 hop out. How many now? 8 beetles on a leaf. 5 fly away. How many now? Double 5 is ___ Double ___ is 8 Double 3 is ___ What do you have to do when you double? How do you know a number is a double? © hamilton-trust. org. uk 47 Year R/1
Problem solving and reasoning questions Choose 3 number cards. Choose an efficient strategy to add them. Write the answer. 7 3 5 7 4 6 Tell me why you added them in that order. Choose three more and do it again… © hamilton-trust. org. uk 48 Year R/1
Problem solving and reasoning: Answers Point at the first number and count on. 8 beetles on a leaf. 5 fly away. How many now? 3. 5+4=9 6+2=8 3+6=9 3+5=8 7+2=9 1+7=8 If children are consistently wrong, check that they are not including the start number in the count. Double 5 is 10. Double 4 is 8. Double 3 is 6. What do you have to do when you double? Find two lots of the number or add the number to itself. How do you know a number is a double? It is even/can be split into two groups (e. g. of cubes) with the same number in each, with none left over. Some children may be able to model this without being able to articulate it. 9 frogs in the pond. 3 hop out. How many now? 6. This, and the following question, can be modelled with counters or cubes. © hamilton-trust. org. uk 49 Year R/1
Problem solving and reasoning: Answers Choose 3 number cards. Choose an efficient strategy to add them. Write the answer. 7 4 3 7 5 6 Tell me why you added them in that order. Choose three more and do it again… Strategies to look for include…. • Number bonds to 10 (e. g. 7 + 3, 6 + 4). • Using place value to add to 10, e. g. 10 + 5 = 15. • Using a double (7 + 7) or near double (5 + 6). • Counting on from a larger number, e. g. 5 + 3 rather than 3 + 5. © hamilton-trust. org. uk 50 Year R/1
- Slides: 50