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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 786 · 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. 1.52 + ? = 100
  2. 2.25 + ? = 100
  3. 3.1 + ? = 10
  4. 4.3 + ? = 10
  5. 5.5 + ? = 10
  6. 6.45 + ? = 100
  7. 7.8 + ? = 10
  8. 8.6 + ? = 10
  9. 9.68 + ? = 100
  10. 10.7 + ? = 10
  11. 11.16 + ? = 100
  12. 12.81 + ? = 100
  13. 13.4 + ? = 10
  14. 14.2 + ? = 10
  15. 15.26 + ? = 100
  16. 16.39 + ? = 100
  17. 17.57 + ? = 100
  18. 18.41 + ? = 100
  19. 19.50 + ? = 100
  20. 20.66 + ? = 100
  21. 21.9 + ? = 10
  22. 22.34 + ? = 100
  23. 23.82 + ? = 100
  24. 24.27 + ? = 100
  25. 25.23 + ? = 100
  26. 26.14 + ? = 100
  27. 27.44 + ? = 100
  28. 28.47 + ? = 100
  29. 29.32 + ? = 100
  30. 30.63 + ? = 100
  31. 31.12 + ? = 100
  32. 32.19 + ? = 100
  33. 33.29 + ? = 100
  34. 34.86 + ? = 100
  35. 35.53 + ? = 100
  36. 36.64 + ? = 100
  37. 37.58 + ? = 100
  38. 38.89 + ? = 100
  39. 39.74 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 48
  2. 75
  3. 9
  4. 7
  5. 5
  6. 55
  7. 2
  8. 4
  9. 32
  10. 3
  11. 84
  12. 19
  13. 6
  14. 8
  15. 74
  16. 61
  17. 43
  18. 59
  19. 50
  20. 34
  21. 1
  22. 66
  23. 18
  24. 73
  25. 77
  26. 86
  27. 56
  28. 53
  29. 68
  30. 37
  31. 88
  32. 81
  33. 71
  34. 14
  35. 47
  36. 36
  37. 42
  38. 11
  39. 26
  40. 63

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