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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 385 · 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. 1.74 + ? = 100
  2. 2.1 + ? = 10
  3. 3.86 + ? = 100
  4. 4.7 + ? = 10
  5. 5.38 + ? = 100
  6. 6.4 + ? = 10
  7. 7.30 + ? = 100
  8. 8.2 + ? = 10
  9. 9.17 + ? = 100
  10. 10.8 + ? = 10
  11. 11.5 + ? = 10
  12. 12.44 + ? = 100
  13. 13.53 + ? = 100
  14. 14.6 + ? = 10
  15. 15.68 + ? = 100
  16. 16.3 + ? = 10
  17. 17.82 + ? = 100
  18. 18.21 + ? = 100
  19. 19.9 + ? = 10
  20. 20.32 + ? = 100
  21. 21.28 + ? = 100
  22. 22.52 + ? = 100
  23. 23.48 + ? = 100
  24. 24.73 + ? = 100
  25. 25.29 + ? = 100
  26. 26.62 + ? = 100
  27. 27.88 + ? = 100
  28. 28.12 + ? = 100
  29. 29.58 + ? = 100
  30. 30.24 + ? = 100
  31. 31.55 + ? = 100
  32. 32.89 + ? = 100
  33. 33.69 + ? = 100
  34. 34.19 + ? = 100
  35. 35.51 + ? = 100
  36. 36.61 + ? = 100
  37. 37.16 + ? = 100
  38. 38.54 + ? = 100
  39. 39.81 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 26
  2. 9
  3. 14
  4. 3
  5. 62
  6. 6
  7. 70
  8. 8
  9. 83
  10. 2
  11. 5
  12. 56
  13. 47
  14. 4
  15. 32
  16. 7
  17. 18
  18. 79
  19. 1
  20. 68
  21. 72
  22. 48
  23. 52
  24. 27
  25. 71
  26. 38
  27. 12
  28. 88
  29. 42
  30. 76
  31. 45
  32. 11
  33. 31
  34. 81
  35. 49
  36. 39
  37. 84
  38. 46
  39. 19
  40. 33

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