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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 358 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.37 + ? = 100
  4. 4.1 + ? = 10
  5. 5.24 + ? = 100
  6. 6.2 + ? = 10
  7. 7.8 + ? = 10
  8. 8.45 + ? = 100
  9. 9.84 + ? = 100
  10. 10.16 + ? = 100
  11. 11.5 + ? = 10
  12. 12.6 + ? = 10
  13. 13.32 + ? = 100
  14. 14.21 + ? = 100
  15. 15.29 + ? = 100
  16. 16.58 + ? = 100
  17. 17.54 + ? = 100
  18. 18.40 + ? = 100
  19. 19.89 + ? = 100
  20. 20.4 + ? = 10
  21. 21.26 + ? = 100
  22. 22.44 + ? = 100
  23. 23.36 + ? = 100
  24. 24.71 + ? = 100
  25. 25.88 + ? = 100
  26. 26.61 + ? = 100
  27. 27.27 + ? = 100
  28. 28.19 + ? = 100
  29. 29.23 + ? = 100
  30. 30.39 + ? = 100
  31. 31.35 + ? = 100
  32. 32.51 + ? = 100
  33. 33.41 + ? = 100
  34. 34.14 + ? = 100
  35. 35.65 + ? = 100
  36. 36.48 + ? = 100
  37. 37.63 + ? = 100
  38. 38.15 + ? = 100
  39. 39.60 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 3
  2. 1
  3. 63
  4. 9
  5. 76
  6. 8
  7. 2
  8. 55
  9. 16
  10. 84
  11. 5
  12. 4
  13. 68
  14. 79
  15. 71
  16. 42
  17. 46
  18. 60
  19. 11
  20. 6
  21. 74
  22. 56
  23. 64
  24. 29
  25. 12
  26. 39
  27. 73
  28. 81
  29. 77
  30. 61
  31. 65
  32. 49
  33. 59
  34. 86
  35. 35
  36. 52
  37. 37
  38. 85
  39. 40
  40. 87

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