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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 62 · 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. 1.68 + ? = 100
  2. 2.8 + ? = 10
  3. 3.84 + ? = 100
  4. 4.15 + ? = 100
  5. 5.7 + ? = 10
  6. 6.55 + ? = 100
  7. 7.3 + ? = 10
  8. 8.6 + ? = 10
  9. 9.4 + ? = 10
  10. 10.86 + ? = 100
  11. 11.41 + ? = 100
  12. 12.46 + ? = 100
  13. 13.59 + ? = 100
  14. 14.82 + ? = 100
  15. 15.2 + ? = 10
  16. 16.19 + ? = 100
  17. 17.39 + ? = 100
  18. 18.5 + ? = 10
  19. 19.9 + ? = 10
  20. 20.18 + ? = 100
  21. 21.81 + ? = 100
  22. 22.1 + ? = 10
  23. 23.80 + ? = 100
  24. 24.76 + ? = 100
  25. 25.33 + ? = 100
  26. 26.60 + ? = 100
  27. 27.48 + ? = 100
  28. 28.89 + ? = 100
  29. 29.37 + ? = 100
  30. 30.57 + ? = 100
  31. 31.51 + ? = 100
  32. 32.14 + ? = 100
  33. 33.29 + ? = 100
  34. 34.69 + ? = 100
  35. 35.85 + ? = 100
  36. 36.24 + ? = 100
  37. 37.30 + ? = 100
  38. 38.74 + ? = 100
  39. 39.40 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 32
  2. 2
  3. 16
  4. 85
  5. 3
  6. 45
  7. 7
  8. 4
  9. 6
  10. 14
  11. 59
  12. 54
  13. 41
  14. 18
  15. 8
  16. 81
  17. 61
  18. 5
  19. 1
  20. 82
  21. 19
  22. 9
  23. 20
  24. 24
  25. 67
  26. 40
  27. 52
  28. 11
  29. 63
  30. 43
  31. 49
  32. 86
  33. 71
  34. 31
  35. 15
  36. 76
  37. 70
  38. 26
  39. 60
  40. 47

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