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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 784 · 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. 1.8 + ? = 10
  2. 2.14 + ? = 100
  3. 3.28 + ? = 100
  4. 4.82 + ? = 100
  5. 5.36 + ? = 100
  6. 6.3 + ? = 10
  7. 7.4 + ? = 10
  8. 8.74 + ? = 100
  9. 9.61 + ? = 100
  10. 10.5 + ? = 10
  11. 11.1 + ? = 10
  12. 12.68 + ? = 100
  13. 13.7 + ? = 10
  14. 14.2 + ? = 10
  15. 15.9 + ? = 10
  16. 16.19 + ? = 100
  17. 17.35 + ? = 100
  18. 18.62 + ? = 100
  19. 19.21 + ? = 100
  20. 20.60 + ? = 100
  21. 21.42 + ? = 100
  22. 22.69 + ? = 100
  23. 23.63 + ? = 100
  24. 24.80 + ? = 100
  25. 25.20 + ? = 100
  26. 26.71 + ? = 100
  27. 27.26 + ? = 100
  28. 28.6 + ? = 10
  29. 29.31 + ? = 100
  30. 30.45 + ? = 100
  31. 31.27 + ? = 100
  32. 32.37 + ? = 100
  33. 33.87 + ? = 100
  34. 34.58 + ? = 100
  35. 35.13 + ? = 100
  36. 36.72 + ? = 100
  37. 37.33 + ? = 100
  38. 38.75 + ? = 100
  39. 39.25 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 2
  2. 86
  3. 72
  4. 18
  5. 64
  6. 7
  7. 6
  8. 26
  9. 39
  10. 5
  11. 9
  12. 32
  13. 3
  14. 8
  15. 1
  16. 81
  17. 65
  18. 38
  19. 79
  20. 40
  21. 58
  22. 31
  23. 37
  24. 20
  25. 80
  26. 29
  27. 74
  28. 4
  29. 69
  30. 55
  31. 73
  32. 63
  33. 13
  34. 42
  35. 87
  36. 28
  37. 67
  38. 25
  39. 75
  40. 83

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