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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 763 · 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. 1.14 + ? = 100
  2. 2.79 + ? = 100
  3. 3.17 + ? = 100
  4. 4.32 + ? = 100
  5. 5.54 + ? = 100
  6. 6.52 + ? = 100
  7. 7.41 + ? = 100
  8. 8.1 + ? = 10
  9. 9.3 + ? = 10
  10. 10.9 + ? = 10
  11. 11.61 + ? = 100
  12. 12.50 + ? = 100
  13. 13.5 + ? = 10
  14. 14.20 + ? = 100
  15. 15.18 + ? = 100
  16. 16.2 + ? = 10
  17. 17.21 + ? = 100
  18. 18.7 + ? = 10
  19. 19.67 + ? = 100
  20. 20.33 + ? = 100
  21. 21.8 + ? = 10
  22. 22.39 + ? = 100
  23. 23.4 + ? = 10
  24. 24.56 + ? = 100
  25. 25.6 + ? = 10
  26. 26.13 + ? = 100
  27. 27.34 + ? = 100
  28. 28.45 + ? = 100
  29. 29.58 + ? = 100
  30. 30.27 + ? = 100
  31. 31.11 + ? = 100
  32. 32.40 + ? = 100
  33. 33.44 + ? = 100
  34. 34.51 + ? = 100
  35. 35.53 + ? = 100
  36. 36.62 + ? = 100
  37. 37.43 + ? = 100
  38. 38.81 + ? = 100
  39. 39.16 + ? = 100
  40. 40.86 + ? = 100

Answer key

  1. 86
  2. 21
  3. 83
  4. 68
  5. 46
  6. 48
  7. 59
  8. 9
  9. 7
  10. 1
  11. 39
  12. 50
  13. 5
  14. 80
  15. 82
  16. 8
  17. 79
  18. 3
  19. 33
  20. 67
  21. 2
  22. 61
  23. 6
  24. 44
  25. 4
  26. 87
  27. 66
  28. 55
  29. 42
  30. 73
  31. 89
  32. 60
  33. 56
  34. 49
  35. 47
  36. 38
  37. 57
  38. 19
  39. 84
  40. 14

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