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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 655 · 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. 2.4 + ? = 10
  3. 3.7 + ? = 10
  4. 4.62 + ? = 100
  5. 5.57 + ? = 100
  6. 6.3 + ? = 10
  7. 7.17 + ? = 100
  8. 8.78 + ? = 100
  9. 9.1 + ? = 10
  10. 10.14 + ? = 100
  11. 11.65 + ? = 100
  12. 12.77 + ? = 100
  13. 13.12 + ? = 100
  14. 14.53 + ? = 100
  15. 15.6 + ? = 10
  16. 16.29 + ? = 100
  17. 17.20 + ? = 100
  18. 18.2 + ? = 10
  19. 19.85 + ? = 100
  20. 20.15 + ? = 100
  21. 21.67 + ? = 100
  22. 22.61 + ? = 100
  23. 23.23 + ? = 100
  24. 24.68 + ? = 100
  25. 25.9 + ? = 10
  26. 26.32 + ? = 100
  27. 27.73 + ? = 100
  28. 28.87 + ? = 100
  29. 29.41 + ? = 100
  30. 30.74 + ? = 100
  31. 31.39 + ? = 100
  32. 32.18 + ? = 100
  33. 33.45 + ? = 100
  34. 34.70 + ? = 100
  35. 35.36 + ? = 100
  36. 36.88 + ? = 100
  37. 37.19 + ? = 100
  38. 38.30 + ? = 100
  39. 39.51 + ? = 100
  40. 40.35 + ? = 100

Answer key

  1. 2
  2. 6
  3. 3
  4. 38
  5. 43
  6. 7
  7. 83
  8. 22
  9. 9
  10. 86
  11. 35
  12. 23
  13. 88
  14. 47
  15. 4
  16. 71
  17. 80
  18. 8
  19. 15
  20. 85
  21. 33
  22. 39
  23. 77
  24. 32
  25. 1
  26. 68
  27. 27
  28. 13
  29. 59
  30. 26
  31. 61
  32. 82
  33. 55
  34. 30
  35. 64
  36. 12
  37. 81
  38. 70
  39. 49
  40. 65

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