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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 93 · 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. 1.58 + ? = 100
  2. 2.2 + ? = 10
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.9 + ? = 10
  6. 6.3 + ? = 10
  7. 7.77 + ? = 100
  8. 8.87 + ? = 100
  9. 9.72 + ? = 100
  10. 10.64 + ? = 100
  11. 11.8 + ? = 10
  12. 12.44 + ? = 100
  13. 13.25 + ? = 100
  14. 14.6 + ? = 10
  15. 15.1 + ? = 10
  16. 16.14 + ? = 100
  17. 17.61 + ? = 100
  18. 18.7 + ? = 10
  19. 19.76 + ? = 100
  20. 20.56 + ? = 100
  21. 21.48 + ? = 100
  22. 22.20 + ? = 100
  23. 23.34 + ? = 100
  24. 24.28 + ? = 100
  25. 25.16 + ? = 100
  26. 26.83 + ? = 100
  27. 27.42 + ? = 100
  28. 28.66 + ? = 100
  29. 29.29 + ? = 100
  30. 30.55 + ? = 100
  31. 31.15 + ? = 100
  32. 32.68 + ? = 100
  33. 33.71 + ? = 100
  34. 34.41 + ? = 100
  35. 35.49 + ? = 100
  36. 36.80 + ? = 100
  37. 37.57 + ? = 100
  38. 38.73 + ? = 100
  39. 39.84 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 42
  2. 8
  3. 6
  4. 5
  5. 1
  6. 7
  7. 23
  8. 13
  9. 28
  10. 36
  11. 2
  12. 56
  13. 75
  14. 4
  15. 9
  16. 86
  17. 39
  18. 3
  19. 24
  20. 44
  21. 52
  22. 80
  23. 66
  24. 72
  25. 84
  26. 17
  27. 58
  28. 34
  29. 71
  30. 45
  31. 85
  32. 32
  33. 29
  34. 59
  35. 51
  36. 20
  37. 43
  38. 27
  39. 16
  40. 18

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