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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 844 · 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. 1.47 + ? = 100
  2. 2.6 + ? = 10
  3. 3.42 + ? = 100
  4. 4.4 + ? = 10
  5. 5.1 + ? = 10
  6. 6.5 + ? = 10
  7. 7.15 + ? = 100
  8. 8.62 + ? = 100
  9. 9.2 + ? = 10
  10. 10.71 + ? = 100
  11. 11.76 + ? = 100
  12. 12.8 + ? = 10
  13. 13.53 + ? = 100
  14. 14.39 + ? = 100
  15. 15.63 + ? = 100
  16. 16.11 + ? = 100
  17. 17.86 + ? = 100
  18. 18.75 + ? = 100
  19. 19.9 + ? = 10
  20. 20.48 + ? = 100
  21. 21.50 + ? = 100
  22. 22.7 + ? = 10
  23. 23.3 + ? = 10
  24. 24.64 + ? = 100
  25. 25.69 + ? = 100
  26. 26.21 + ? = 100
  27. 27.72 + ? = 100
  28. 28.26 + ? = 100
  29. 29.23 + ? = 100
  30. 30.20 + ? = 100
  31. 31.81 + ? = 100
  32. 32.28 + ? = 100
  33. 33.66 + ? = 100
  34. 34.29 + ? = 100
  35. 35.18 + ? = 100
  36. 36.35 + ? = 100
  37. 37.88 + ? = 100
  38. 38.55 + ? = 100
  39. 39.61 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 53
  2. 4
  3. 58
  4. 6
  5. 9
  6. 5
  7. 85
  8. 38
  9. 8
  10. 29
  11. 24
  12. 2
  13. 47
  14. 61
  15. 37
  16. 89
  17. 14
  18. 25
  19. 1
  20. 52
  21. 50
  22. 3
  23. 7
  24. 36
  25. 31
  26. 79
  27. 28
  28. 74
  29. 77
  30. 80
  31. 19
  32. 72
  33. 34
  34. 71
  35. 82
  36. 65
  37. 12
  38. 45
  39. 39
  40. 35

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