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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 942 · 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. 1.2 + ? = 10
  2. 2.36 + ? = 100
  3. 3.30 + ? = 100
  4. 4.1 + ? = 10
  5. 5.48 + ? = 100
  6. 6.7 + ? = 10
  7. 7.82 + ? = 100
  8. 8.23 + ? = 100
  9. 9.20 + ? = 100
  10. 10.8 + ? = 10
  11. 11.46 + ? = 100
  12. 12.53 + ? = 100
  13. 13.81 + ? = 100
  14. 14.83 + ? = 100
  15. 15.3 + ? = 10
  16. 16.34 + ? = 100
  17. 17.4 + ? = 10
  18. 18.16 + ? = 100
  19. 19.29 + ? = 100
  20. 20.19 + ? = 100
  21. 21.62 + ? = 100
  22. 22.24 + ? = 100
  23. 23.28 + ? = 100
  24. 24.71 + ? = 100
  25. 25.12 + ? = 100
  26. 26.6 + ? = 10
  27. 27.9 + ? = 10
  28. 28.76 + ? = 100
  29. 29.65 + ? = 100
  30. 30.17 + ? = 100
  31. 31.60 + ? = 100
  32. 32.5 + ? = 10
  33. 33.77 + ? = 100
  34. 34.88 + ? = 100
  35. 35.67 + ? = 100
  36. 36.85 + ? = 100
  37. 37.43 + ? = 100
  38. 38.25 + ? = 100
  39. 39.32 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 8
  2. 64
  3. 70
  4. 9
  5. 52
  6. 3
  7. 18
  8. 77
  9. 80
  10. 2
  11. 54
  12. 47
  13. 19
  14. 17
  15. 7
  16. 66
  17. 6
  18. 84
  19. 71
  20. 81
  21. 38
  22. 76
  23. 72
  24. 29
  25. 88
  26. 4
  27. 1
  28. 24
  29. 35
  30. 83
  31. 40
  32. 5
  33. 23
  34. 12
  35. 33
  36. 15
  37. 57
  38. 75
  39. 68
  40. 41

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