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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 822 · 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. 1.60 + ? = 100
  2. 2.3 + ? = 10
  3. 3.2 + ? = 10
  4. 4.6 + ? = 10
  5. 5.47 + ? = 100
  6. 6.19 + ? = 100
  7. 7.7 + ? = 10
  8. 8.8 + ? = 10
  9. 9.59 + ? = 100
  10. 10.9 + ? = 10
  11. 11.24 + ? = 100
  12. 12.51 + ? = 100
  13. 13.80 + ? = 100
  14. 14.45 + ? = 100
  15. 15.28 + ? = 100
  16. 16.5 + ? = 10
  17. 17.66 + ? = 100
  18. 18.89 + ? = 100
  19. 19.46 + ? = 100
  20. 20.1 + ? = 10
  21. 21.16 + ? = 100
  22. 22.76 + ? = 100
  23. 23.14 + ? = 100
  24. 24.88 + ? = 100
  25. 25.38 + ? = 100
  26. 26.79 + ? = 100
  27. 27.48 + ? = 100
  28. 28.17 + ? = 100
  29. 29.30 + ? = 100
  30. 30.37 + ? = 100
  31. 31.72 + ? = 100
  32. 32.13 + ? = 100
  33. 33.42 + ? = 100
  34. 34.84 + ? = 100
  35. 35.63 + ? = 100
  36. 36.67 + ? = 100
  37. 37.26 + ? = 100
  38. 38.4 + ? = 10
  39. 39.49 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 40
  2. 7
  3. 8
  4. 4
  5. 53
  6. 81
  7. 3
  8. 2
  9. 41
  10. 1
  11. 76
  12. 49
  13. 20
  14. 55
  15. 72
  16. 5
  17. 34
  18. 11
  19. 54
  20. 9
  21. 84
  22. 24
  23. 86
  24. 12
  25. 62
  26. 21
  27. 52
  28. 83
  29. 70
  30. 63
  31. 28
  32. 87
  33. 58
  34. 16
  35. 37
  36. 33
  37. 74
  38. 6
  39. 51
  40. 60

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