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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 650 · 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. 1.1 + ? = 10
  2. 2.41 + ? = 100
  3. 3.17 + ? = 100
  4. 4.24 + ? = 100
  5. 5.8 + ? = 10
  6. 6.6 + ? = 10
  7. 7.4 + ? = 10
  8. 8.2 + ? = 10
  9. 9.45 + ? = 100
  10. 10.3 + ? = 10
  11. 11.13 + ? = 100
  12. 12.78 + ? = 100
  13. 13.72 + ? = 100
  14. 14.84 + ? = 100
  15. 15.7 + ? = 10
  16. 16.26 + ? = 100
  17. 17.29 + ? = 100
  18. 18.50 + ? = 100
  19. 19.9 + ? = 10
  20. 20.23 + ? = 100
  21. 21.12 + ? = 100
  22. 22.83 + ? = 100
  23. 23.36 + ? = 100
  24. 24.63 + ? = 100
  25. 25.47 + ? = 100
  26. 26.53 + ? = 100
  27. 27.21 + ? = 100
  28. 28.30 + ? = 100
  29. 29.18 + ? = 100
  30. 30.28 + ? = 100
  31. 31.43 + ? = 100
  32. 32.55 + ? = 100
  33. 33.67 + ? = 100
  34. 34.69 + ? = 100
  35. 35.58 + ? = 100
  36. 36.57 + ? = 100
  37. 37.61 + ? = 100
  38. 38.86 + ? = 100
  39. 39.51 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 9
  2. 59
  3. 83
  4. 76
  5. 2
  6. 4
  7. 6
  8. 8
  9. 55
  10. 7
  11. 87
  12. 22
  13. 28
  14. 16
  15. 3
  16. 74
  17. 71
  18. 50
  19. 1
  20. 77
  21. 88
  22. 17
  23. 64
  24. 37
  25. 53
  26. 47
  27. 79
  28. 70
  29. 82
  30. 72
  31. 57
  32. 45
  33. 33
  34. 31
  35. 42
  36. 43
  37. 39
  38. 14
  39. 49
  40. 58

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