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Subtraction: Adding UP. Category 1 The whole is a multiple of ten.

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Presentation on theme: "Subtraction: Adding UP. Category 1 The whole is a multiple of ten."— Presentation transcript:

1 Subtraction: Adding UP

2 Category 1 The whole is a multiple of ten.

3 20 – – – – 11

4 20 – – 9 20 – 7 20 – 8

5 30 – – – – 12

6 30 – – – – 21

7 40 – – – – 18

8 40 – – – – 24

9 50 – – – – 33

10 60 – – – – 19

11 70 – – – – 18

12 Category 2 The whole is a no longer multiple of ten but is below fifty.

13 15 – 9

14 21 – – 9 21 – 7 21 – 8

15 25 – – – – 9

16 23 – – – – 9

17 31 – – – – 15

18 32 – – – – 15

19 44 – – – – 25

20 41 – – – – 19

21 23 – – – – 18

22 Category 3 Mixture of numbers that lend themselves to the Adding Up Strategy

23 20 – – – – 17

24 30 – – – – 27

25 40 – – – – 34

26 50 – – – – 17

27 60 – – – – 19

28 70 – – – – 36

29 80 – – – – 58

30 90 – – – – 69

31 100 – – – – 24


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