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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 634 · 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. 1.3 + ? = 10
  2. 2.34 + ? = 100
  3. 3.23 + ? = 100
  4. 4.36 + ? = 100
  5. 5.12 + ? = 100
  6. 6.1 + ? = 10
  7. 7.77 + ? = 100
  8. 8.7 + ? = 10
  9. 9.9 + ? = 10
  10. 10.67 + ? = 100
  11. 11.29 + ? = 100
  12. 12.84 + ? = 100
  13. 13.16 + ? = 100
  14. 14.47 + ? = 100
  15. 15.5 + ? = 10
  16. 16.6 + ? = 10
  17. 17.75 + ? = 100
  18. 18.4 + ? = 10
  19. 19.52 + ? = 100
  20. 20.2 + ? = 10
  21. 21.87 + ? = 100
  22. 22.11 + ? = 100
  23. 23.89 + ? = 100
  24. 24.8 + ? = 10
  25. 25.76 + ? = 100
  26. 26.13 + ? = 100
  27. 27.41 + ? = 100
  28. 28.32 + ? = 100
  29. 29.78 + ? = 100
  30. 30.46 + ? = 100
  31. 31.86 + ? = 100
  32. 32.73 + ? = 100
  33. 33.38 + ? = 100
  34. 34.15 + ? = 100
  35. 35.61 + ? = 100
  36. 36.88 + ? = 100
  37. 37.14 + ? = 100
  38. 38.44 + ? = 100
  39. 39.64 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 7
  2. 66
  3. 77
  4. 64
  5. 88
  6. 9
  7. 23
  8. 3
  9. 1
  10. 33
  11. 71
  12. 16
  13. 84
  14. 53
  15. 5
  16. 4
  17. 25
  18. 6
  19. 48
  20. 8
  21. 13
  22. 89
  23. 11
  24. 2
  25. 24
  26. 87
  27. 59
  28. 68
  29. 22
  30. 54
  31. 14
  32. 27
  33. 62
  34. 85
  35. 39
  36. 12
  37. 86
  38. 56
  39. 36
  40. 73

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