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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 864 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.6 + ? = 10
  2. 2.66 + ? = 100
  3. 3.44 + ? = 100
  4. 4.1 + ? = 10
  5. 5.39 + ? = 100
  6. 6.20 + ? = 100
  7. 7.8 + ? = 10
  8. 8.57 + ? = 100
  9. 9.17 + ? = 100
  10. 10.74 + ? = 100
  11. 11.58 + ? = 100
  12. 12.12 + ? = 100
  13. 13.2 + ? = 10
  14. 14.14 + ? = 100
  15. 15.78 + ? = 100
  16. 16.36 + ? = 100
  17. 17.55 + ? = 100
  18. 18.26 + ? = 100
  19. 19.19 + ? = 100
  20. 20.4 + ? = 10
  21. 21.63 + ? = 100
  22. 22.3 + ? = 10
  23. 23.43 + ? = 100
  24. 24.54 + ? = 100
  25. 25.84 + ? = 100
  26. 26.72 + ? = 100
  27. 27.70 + ? = 100
  28. 28.47 + ? = 100
  29. 29.48 + ? = 100
  30. 30.37 + ? = 100
  31. 31.52 + ? = 100
  32. 32.60 + ? = 100
  33. 33.9 + ? = 10
  34. 34.77 + ? = 100
  35. 35.56 + ? = 100
  36. 36.42 + ? = 100
  37. 37.67 + ? = 100
  38. 38.5 + ? = 10
  39. 39.7 + ? = 10
  40. 40.80 + ? = 100

Answer key

  1. 4
  2. 34
  3. 56
  4. 9
  5. 61
  6. 80
  7. 2
  8. 43
  9. 83
  10. 26
  11. 42
  12. 88
  13. 8
  14. 86
  15. 22
  16. 64
  17. 45
  18. 74
  19. 81
  20. 6
  21. 37
  22. 7
  23. 57
  24. 46
  25. 16
  26. 28
  27. 30
  28. 53
  29. 52
  30. 63
  31. 48
  32. 40
  33. 1
  34. 23
  35. 44
  36. 58
  37. 33
  38. 5
  39. 3
  40. 20

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