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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 539 · 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. 1.2 + ? = 10
  2. 2.3 + ? = 10
  3. 3.68 + ? = 100
  4. 4.5 + ? = 10
  5. 5.8 + ? = 10
  6. 6.64 + ? = 100
  7. 7.24 + ? = 100
  8. 8.62 + ? = 100
  9. 9.35 + ? = 100
  10. 10.61 + ? = 100
  11. 11.1 + ? = 10
  12. 12.30 + ? = 100
  13. 13.72 + ? = 100
  14. 14.7 + ? = 10
  15. 15.57 + ? = 100
  16. 16.4 + ? = 10
  17. 17.86 + ? = 100
  18. 18.51 + ? = 100
  19. 19.59 + ? = 100
  20. 20.48 + ? = 100
  21. 21.12 + ? = 100
  22. 22.21 + ? = 100
  23. 23.77 + ? = 100
  24. 24.65 + ? = 100
  25. 25.74 + ? = 100
  26. 26.44 + ? = 100
  27. 27.52 + ? = 100
  28. 28.80 + ? = 100
  29. 29.9 + ? = 10
  30. 30.23 + ? = 100
  31. 31.66 + ? = 100
  32. 32.88 + ? = 100
  33. 33.87 + ? = 100
  34. 34.14 + ? = 100
  35. 35.39 + ? = 100
  36. 36.20 + ? = 100
  37. 37.28 + ? = 100
  38. 38.6 + ? = 10
  39. 39.45 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 8
  2. 7
  3. 32
  4. 5
  5. 2
  6. 36
  7. 76
  8. 38
  9. 65
  10. 39
  11. 9
  12. 70
  13. 28
  14. 3
  15. 43
  16. 6
  17. 14
  18. 49
  19. 41
  20. 52
  21. 88
  22. 79
  23. 23
  24. 35
  25. 26
  26. 56
  27. 48
  28. 20
  29. 1
  30. 77
  31. 34
  32. 12
  33. 13
  34. 86
  35. 61
  36. 80
  37. 72
  38. 4
  39. 55
  40. 53

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