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Subtraction: Adding UP

Subtraction: Adding UP. Category 1. The whole is a multiple of ten. 20 – 15 20 – 14 20 – 12 20 – 11. 20 – 10 20 – 9 20 – 7 20 – 8. 30 – 25 30 – 23 30 – 15 30 – 12. 30 – 19 3 0 – 14 3 0 – 24 3 0 – 21. 4 0 – 34 4 0 – 29 4 0 – 20 4 0 – 18. 4 0 – 32

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Subtraction: Adding UP

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  1. Subtraction: Adding UP

  2. Category 1 The whole is a multiple of ten.

  3. 20 – 15 20 – 14 20 – 12 20 – 11

  4. 20 – 10 20 – 9 20 – 7 20 – 8

  5. 30 – 25 30 – 23 30 – 15 30 – 12

  6. 30 – 19 30 – 14 30 – 24 30 – 21

  7. 40 – 34 40 – 29 40 – 20 40 – 18

  8. 40 – 32 40 – 28 40 – 19 40 – 24

  9. 50 – 39 50 – 44 50 – 24 50 – 33

  10. 60 – 49 60 – 29 60 – 39 60 – 19

  11. 70 – 59 70 – 34 70 – 49 70 – 18

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

  13. 15 – 9 15 – 9 15 – 9 15 – 9

  14. 21 – 10 21 – 9 21 – 7 21 – 8

  15. 25 – 19 25 – 16 25 – 18 25 – 9

  16. 23 – 19 23 – 16 23 – 14 23 – 9

  17. 31 – 29 31 – 26 31 – 24 31 – 15

  18. 32 – 28 32 – 25 32 – 19 32 – 15

  19. 44 – 39 44 – 35 44 – 29 44 – 25

  20. 41 – 34 41 – 28 41 – 24 41 – 19

  21. 23 – 19 33 – 19 42 – 29 41 – 18

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

  23. 20 – 14 24 – 19 22 – 13 26 – 17

  24. 30 – 15 33 – 19 33 – 14 36 – 27

  25. 40 – 19 45 – 19 42 – 23 42 – 34

  26. 50 – 24 50 – 39 56 – 28 56 – 17

  27. 60 – 49 60 – 27 63 – 56 63 – 19

  28. 70 – 61 70 – 34 74 – 49 74 – 36

  29. 80 – 39 80 – 68 81 – 49 81 – 58

  30. 90 – 79 90 – 74 92 – 89 92 – 69

  31. 100 – 97 100 – 89 100 – 49 100 – 24

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