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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 896 · 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. 1.1 + ? = 10
  2. 2.4 + ? = 10
  3. 3.6 + ? = 10
  4. 4.86 + ? = 100
  5. 5.55 + ? = 100
  6. 6.9 + ? = 10
  7. 7.3 + ? = 10
  8. 8.8 + ? = 10
  9. 9.21 + ? = 100
  10. 10.30 + ? = 100
  11. 11.59 + ? = 100
  12. 12.2 + ? = 10
  13. 13.19 + ? = 100
  14. 14.46 + ? = 100
  15. 15.78 + ? = 100
  16. 16.63 + ? = 100
  17. 17.40 + ? = 100
  18. 18.79 + ? = 100
  19. 19.72 + ? = 100
  20. 20.13 + ? = 100
  21. 21.32 + ? = 100
  22. 22.53 + ? = 100
  23. 23.25 + ? = 100
  24. 24.48 + ? = 100
  25. 25.47 + ? = 100
  26. 26.81 + ? = 100
  27. 27.83 + ? = 100
  28. 28.5 + ? = 10
  29. 29.62 + ? = 100
  30. 30.7 + ? = 10
  31. 31.82 + ? = 100
  32. 32.80 + ? = 100
  33. 33.89 + ? = 100
  34. 34.34 + ? = 100
  35. 35.74 + ? = 100
  36. 36.57 + ? = 100
  37. 37.22 + ? = 100
  38. 38.52 + ? = 100
  39. 39.11 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 9
  2. 6
  3. 4
  4. 14
  5. 45
  6. 1
  7. 7
  8. 2
  9. 79
  10. 70
  11. 41
  12. 8
  13. 81
  14. 54
  15. 22
  16. 37
  17. 60
  18. 21
  19. 28
  20. 87
  21. 68
  22. 47
  23. 75
  24. 52
  25. 53
  26. 19
  27. 17
  28. 5
  29. 38
  30. 3
  31. 18
  32. 20
  33. 11
  34. 66
  35. 26
  36. 43
  37. 78
  38. 48
  39. 89
  40. 46

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