YEAR 2 Addition Subtraction Fact families Check calculations

YEAR 2 Addition & Subtraction Fact families Check calculations Compare number sentences Related facts Block 2 – Week 4

Lesson 1 Step: Fact families

Use the picture to create the associated fact family. 5 + ______6= ______ 11 6 + ______5= ______ 11 11 – ______5= ______ 6 ______ 11 – ______6= ______ 5 Fluency

Use the picture to create the associated fact family. 7 + ______8= ______ 15 8 + ______7= ______ 15 15 – ______7= ______ 8 ______ 15 – ______8= ______ 7 Fluency

Use the picture to create the associated fact family. 9 + ______7= ______ 16 7 + ______9= ______ 16 16 – ______9= ______ 7 ______ 16 – ______7= ______ 9 Fluency

Fluency Use the part-whole diagram to create the associated fact family. 6 + ______11= ______ 17 11 + ______6= ______ 17 17 – ______6= ______ 11 ______ 17 – ______11= ______ 6 17 6 11

Fluency Use the part-whole diagram to create the associated fact family. 9 + ______4= ______ 13 4 + ______9= ______ 13 13 – ______9= ______ 4 ______ 13 – ______4= ______ 9 13 9 4

Fluency Use the bar model to create the associated fact family. 11 + ______5= ______ 16 5 + ______11= ______ 16 16 – ______11= ______ 5 ______ 16 – ______5= ______ 11 16 11 5

Fluency Use the bar model to create the associated fact family. 13 + ______7= ______ 20 7 + ______13= ______ 20 20 – ______13= ______ 7 ______ 20 – ______7= ______ 13 20 13 7

Reasoning Spot and correct the mistakes in the fact family below. 14 + 2 = 16 2 + 14 = 16 14 – 16 = 2 2 – 16 = 14 The subtraction calculations should be: 16 – 14 = 2 16 – 2 = 14

Draw part-whole diagrams to show the different ways it could be completed. Can you create a fact family for each part-whole diagram? 16 ______ + ______ = ______ ? ? ______ – ______ = ______ Problem solving

Lesson 2 Step: Check calculations (Practical)

Use counters to check whether the following calculations are true or false. 13 – 5 = 9 False _________ 15 – 8 = 7 _________ True 12 – 5 = 8 _________ False Fluency

Use counters to check whether the following calculations are true or false. 13 + 5 = 18 True _________ 8 + 9 = 17 _________ True 12 + 5 = 19 False _________ Fluency

Use counters to check whether the following calculations are true or false. 17 – 6 = 11 True _________ 13 – 6 = 7 _________ True 16 – 9 = 6 False _________ Fluency

Fluency Sort the calculations into the table below. True False 19 – 4 = 15 18 – 4 = 14 20 – 7 = 12 11 – 4 = 8 9 + 10 = 19 13 + 5 = 18 12 + 7 = 20 9 + 7 = 17 19 – 4 = 15 20 – 7 = 12 18 – 4 = 14 11 – 4 = 8 12 + 7 = 20 9 + 10 = 19 13 + 5 = 18 9 + 7 = 17

Fluency 19 – 5 = 14 Which calculations could be used to check the calculation above? 14 + 5 14 – 19 5 + 14

Fluency 7 + 6 = 13 Which calculations could be used to check the calculation above? 13 + 6 13 – 6 7 – 13 6+7

Reasoning 13 + 4 = 17 cannot be used to check 13 – 4. True or false? Explain why. True. 13 – 4 = 9. This is not a related fact for 13 + 4 = 17. Which related facts should be used to check 13 + 4 = 17? 4 + 13 = 17 17 – 4 = 13 17 – 13 = 4

Which two inverse calculations could be used to check the calculation below? 17 – 9 = 8 8 + 9 = 17 9 + 8 = 17 Problem solving

Lesson 3 Step: Compare number sentences

Fluency Use the number tracks to help you compare the calculations. Compare using greater than, less than or equal to 8 + 5 _________ 6+7

Use the number tracks to help you compare the calculations. Compare using < , > or =. > 5+3 7 + 3 ____ Fluency

Compare the number sentences using >, < or =. 10 + 2 _____ > 8+3 12 + 5 _____ < 14 + 5 16 + 1 _____ > 7+7 Fluency

Compare the number sentences using >, < or =. = 20 – 7 18 – 5 _____ < 15 – 7 11 – 4 _____ > 14 – 9 12 – 6 _____ Fluency

Compare the number sentences using >, < or =. > 7+7 18 – 3 _____ < 20 – 2 8 + 9 _____ = 10 + 2 17 – 5 _____ Fluency

Complete the missing numbers. 6 14 – 5 = 3 + _______ 6 18 – 5 = 19 – _______ 8 11 + 6 = 9 + _______ Fluency

Reasoning There are 4 even numbers that could go in the box. 11 – < 12 – 5 Is Gina correct? No, there are 3 even numbers: 6, 8 and 10.

Problem solving 6 + 9 < 11 + The missing number is less than 10. What could the missing number be? List all possibilities. 5, 6, 7, 8 or 9.

Lesson 4 Step: Related facts

Fluency Complete the part-whole diagrams to show related facts. 9 6 90 3 60 30

Fluency Complete the part-whole diagrams to show related facts. 10 7 100 3 70 30

Fluency Complete the part-whole diagrams to show related facts. 7 3 70 4 30 40

Fluency If I know 6 + 2 = 8, then I know 60 + 20 = _____80 If I know 4 + 5 = 9, then I know 40 + 50 = _____90 100 If I know 4 + 6 = 10, then I know 40 + 60 = _____

Fluency 50 = _____80 If I know 3 + 5 = 8, then I know 30 + _____ 40 + 20 = _____60 If I know 4 + 2 = 6, then I know _____ 70 = _____90 If I know 2 + 7 = 9, then I know 20 + _____

Reasoning Kat has 6 marbles. She gives 4 away. Che has 60 marbles. He gives ______ away. Che has 20 marbles left. True False Kat has 20 marbles left. Che gave 4 marbles away. Kat has 2 marbles left. Che gave 40 marbles away.

Continue the patterns. What is similar? What is different? 6 = 10 – 4 60 = 100 – 40 5 = 10 – 5 50 = 100 – 50 4 = 10 – 6 ________ 40 = 100 – 60 ________ 3 = 10 – 7 ________ 30 = 100 – 70 ________ 2 = 10 – 8 ________ 20 = 100 – 80 ________ 1 = 10 – 9 ________ 10 = 100 – 90 ________ 0 = 10 – 10 ________ 0________ = 100 – 100 Problem solving

Lesson 5 Step: Consolidation