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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 849 · 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. 1.68 + ? = 100
  2. 2.28 + ? = 100
  3. 3.3 + ? = 10
  4. 4.2 + ? = 10
  5. 5.11 + ? = 100
  6. 6.33 + ? = 100
  7. 7.13 + ? = 100
  8. 8.60 + ? = 100
  9. 9.44 + ? = 100
  10. 10.22 + ? = 100
  11. 11.88 + ? = 100
  12. 12.43 + ? = 100
  13. 13.78 + ? = 100
  14. 14.8 + ? = 10
  15. 15.1 + ? = 10
  16. 16.6 + ? = 10
  17. 17.62 + ? = 100
  18. 18.49 + ? = 100
  19. 19.37 + ? = 100
  20. 20.46 + ? = 100
  21. 21.54 + ? = 100
  22. 22.14 + ? = 100
  23. 23.21 + ? = 100
  24. 24.5 + ? = 10
  25. 25.32 + ? = 100
  26. 26.7 + ? = 10
  27. 27.29 + ? = 100
  28. 28.82 + ? = 100
  29. 29.47 + ? = 100
  30. 30.76 + ? = 100
  31. 31.51 + ? = 100
  32. 32.41 + ? = 100
  33. 33.19 + ? = 100
  34. 34.34 + ? = 100
  35. 35.38 + ? = 100
  36. 36.45 + ? = 100
  37. 37.85 + ? = 100
  38. 38.61 + ? = 100
  39. 39.4 + ? = 10
  40. 40.36 + ? = 100

Answer key

  1. 32
  2. 72
  3. 7
  4. 8
  5. 89
  6. 67
  7. 87
  8. 40
  9. 56
  10. 78
  11. 12
  12. 57
  13. 22
  14. 2
  15. 9
  16. 4
  17. 38
  18. 51
  19. 63
  20. 54
  21. 46
  22. 86
  23. 79
  24. 5
  25. 68
  26. 3
  27. 71
  28. 18
  29. 53
  30. 24
  31. 49
  32. 59
  33. 81
  34. 66
  35. 62
  36. 55
  37. 15
  38. 39
  39. 6
  40. 64

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