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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 920 · 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. 1.32 + ? = 100
  2. 2.76 + ? = 100
  3. 3.8 + ? = 10
  4. 4.6 + ? = 10
  5. 5.46 + ? = 100
  6. 6.16 + ? = 100
  7. 7.7 + ? = 10
  8. 8.59 + ? = 100
  9. 9.5 + ? = 10
  10. 10.14 + ? = 100
  11. 11.51 + ? = 100
  12. 12.1 + ? = 10
  13. 13.19 + ? = 100
  14. 14.30 + ? = 100
  15. 15.3 + ? = 10
  16. 16.2 + ? = 10
  17. 17.53 + ? = 100
  18. 18.4 + ? = 10
  19. 19.41 + ? = 100
  20. 20.20 + ? = 100
  21. 21.39 + ? = 100
  22. 22.37 + ? = 100
  23. 23.11 + ? = 100
  24. 24.47 + ? = 100
  25. 25.36 + ? = 100
  26. 26.72 + ? = 100
  27. 27.81 + ? = 100
  28. 28.28 + ? = 100
  29. 29.54 + ? = 100
  30. 30.78 + ? = 100
  31. 31.55 + ? = 100
  32. 32.9 + ? = 10
  33. 33.23 + ? = 100
  34. 34.69 + ? = 100
  35. 35.74 + ? = 100
  36. 36.15 + ? = 100
  37. 37.75 + ? = 100
  38. 38.62 + ? = 100
  39. 39.58 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 68
  2. 24
  3. 2
  4. 4
  5. 54
  6. 84
  7. 3
  8. 41
  9. 5
  10. 86
  11. 49
  12. 9
  13. 81
  14. 70
  15. 7
  16. 8
  17. 47
  18. 6
  19. 59
  20. 80
  21. 61
  22. 63
  23. 89
  24. 53
  25. 64
  26. 28
  27. 19
  28. 72
  29. 46
  30. 22
  31. 45
  32. 1
  33. 77
  34. 31
  35. 26
  36. 85
  37. 25
  38. 38
  39. 42
  40. 18

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