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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 658 · 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. 1.62 + ? = 100
  2. 2.4 + ? = 10
  3. 3.58 + ? = 100
  4. 4.74 + ? = 100
  5. 5.89 + ? = 100
  6. 6.1 + ? = 10
  7. 7.50 + ? = 100
  8. 8.68 + ? = 100
  9. 9.34 + ? = 100
  10. 10.56 + ? = 100
  11. 11.6 + ? = 10
  12. 12.3 + ? = 10
  13. 13.64 + ? = 100
  14. 14.8 + ? = 10
  15. 15.43 + ? = 100
  16. 16.53 + ? = 100
  17. 17.16 + ? = 100
  18. 18.57 + ? = 100
  19. 19.2 + ? = 10
  20. 20.85 + ? = 100
  21. 21.86 + ? = 100
  22. 22.9 + ? = 10
  23. 23.67 + ? = 100
  24. 24.33 + ? = 100
  25. 25.5 + ? = 10
  26. 26.28 + ? = 100
  27. 27.14 + ? = 100
  28. 28.75 + ? = 100
  29. 29.44 + ? = 100
  30. 30.83 + ? = 100
  31. 31.84 + ? = 100
  32. 32.27 + ? = 100
  33. 33.66 + ? = 100
  34. 34.52 + ? = 100
  35. 35.39 + ? = 100
  36. 36.61 + ? = 100
  37. 37.37 + ? = 100
  38. 38.79 + ? = 100
  39. 39.7 + ? = 10
  40. 40.78 + ? = 100

Answer key

  1. 38
  2. 6
  3. 42
  4. 26
  5. 11
  6. 9
  7. 50
  8. 32
  9. 66
  10. 44
  11. 4
  12. 7
  13. 36
  14. 2
  15. 57
  16. 47
  17. 84
  18. 43
  19. 8
  20. 15
  21. 14
  22. 1
  23. 33
  24. 67
  25. 5
  26. 72
  27. 86
  28. 25
  29. 56
  30. 17
  31. 16
  32. 73
  33. 34
  34. 48
  35. 61
  36. 39
  37. 63
  38. 21
  39. 3
  40. 22

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