Numbers Year 1 2 Develop methods for addition

+/- Numbers Year 1 -2 – Develop methods for addition and subtraction within 20 www. Key. Stage 2 Maths. com

8 + 3 = 11

7 + 7 = 14

10 - 3 = 7 9 - 8 = 1

15 - 8 = 7 13 - 9 = 4

Find the difference between the number of blocks in the top row and the bottom row. 8 5 The difference between 8 and 5 is 3. 8 – 5 = 3

Find the difference between the number of blocks in the top row and the bottom row. 10 6 The difference between 10 and 6 is 4. 10 – 6 = 4

14 - 9 = 5

17 - 11 = 6

3 + 5 = 10 - 2 _ 2 jumps

7 - 2 = 9 - _ 4 4 jumps

8 + 2 _ = 10 10 - 2 = 8 2 + 8 _ = 10 10 – 8 = 2 10 8 2

9 + 1 _ = 10 10 - 1 = 9 1 + 9 _ = 10 10 – 9 = 1 10 9 1

7 + 3 _ = 10 10 - 3 = 7 3 + 7 = 10 10 – 7 = 3 10 7 3

6 + 4 _ = 10 10 - 4 = 6 4 + 6 = 10 10 – 6 = 4 10 6 4

5 + 5 _ = 10 10 5 5 10 - 5 = 5

10 + 0 _ = 10 10 – 10 = 0 0 + 10 = 10 10 – 0 = 10 10 10 0

10 9 8 7 6 5 0 1 2 3 4 5

8 = 20 12 + _ 20 - 8 = 12 8 + 12 __ = 20 20 – 12 = 8 20 12 8

5 = 20 15 + _ 20 - 5 = 15 5 + 15 __ = 20 20 – 15 = 5 20 15 5

17 + 3 = 20 20 - 3 = 17 3 + 17 = 20 20 – 17 = 3 20 17 3

20 12 20 8 15 10 2 20 5 17 10 8 5 3 10 5 7 3

20 12 20 8 15 10 2 20 5 17 10 8 5 3 10 5 7 3

19 + 1 = 20 1 + 19 = 20 20 – 1 = 19 20 – 19 = 1 18 + 2 = 20 2 + 18 = 20 20 – 2 = 18 20 – 18 = 2 17 + 3 = 20 3 + 17 = 20 20 – 3 = 17 20 – 17 = 3

5< 7 8 > 2 1 < 2 5 is less than 7 8 is greater than 2 1 is less than 2

8 7 -1 5+2> <2+2

4+2 = 7 -1