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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 124 · 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. 1.7 + ? = 10
  2. 2.2 + ? = 10
  3. 3.63 + ? = 100
  4. 4.4 + ? = 10
  5. 5.3 + ? = 10
  6. 6.1 + ? = 10
  7. 7.52 + ? = 100
  8. 8.9 + ? = 10
  9. 9.5 + ? = 10
  10. 10.54 + ? = 100
  11. 11.36 + ? = 100
  12. 12.32 + ? = 100
  13. 13.35 + ? = 100
  14. 14.51 + ? = 100
  15. 15.55 + ? = 100
  16. 16.46 + ? = 100
  17. 17.87 + ? = 100
  18. 18.8 + ? = 10
  19. 19.60 + ? = 100
  20. 20.57 + ? = 100
  21. 21.43 + ? = 100
  22. 22.20 + ? = 100
  23. 23.6 + ? = 10
  24. 24.23 + ? = 100
  25. 25.62 + ? = 100
  26. 26.86 + ? = 100
  27. 27.26 + ? = 100
  28. 28.25 + ? = 100
  29. 29.80 + ? = 100
  30. 30.82 + ? = 100
  31. 31.79 + ? = 100
  32. 32.17 + ? = 100
  33. 33.40 + ? = 100
  34. 34.48 + ? = 100
  35. 35.31 + ? = 100
  36. 36.19 + ? = 100
  37. 37.15 + ? = 100
  38. 38.77 + ? = 100
  39. 39.88 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 3
  2. 8
  3. 37
  4. 6
  5. 7
  6. 9
  7. 48
  8. 1
  9. 5
  10. 46
  11. 64
  12. 68
  13. 65
  14. 49
  15. 45
  16. 54
  17. 13
  18. 2
  19. 40
  20. 43
  21. 57
  22. 80
  23. 4
  24. 77
  25. 38
  26. 14
  27. 74
  28. 75
  29. 20
  30. 18
  31. 21
  32. 83
  33. 60
  34. 52
  35. 69
  36. 81
  37. 85
  38. 23
  39. 12
  40. 53

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