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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 828 · 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. 1.27 + ? = 100
  2. 2.12 + ? = 100
  3. 3.47 + ? = 100
  4. 4.57 + ? = 100
  5. 5.6 + ? = 10
  6. 6.5 + ? = 10
  7. 7.3 + ? = 10
  8. 8.60 + ? = 100
  9. 9.7 + ? = 10
  10. 10.4 + ? = 10
  11. 11.65 + ? = 100
  12. 12.53 + ? = 100
  13. 13.9 + ? = 10
  14. 14.77 + ? = 100
  15. 15.86 + ? = 100
  16. 16.72 + ? = 100
  17. 17.41 + ? = 100
  18. 18.16 + ? = 100
  19. 19.2 + ? = 10
  20. 20.51 + ? = 100
  21. 21.55 + ? = 100
  22. 22.78 + ? = 100
  23. 23.54 + ? = 100
  24. 24.23 + ? = 100
  25. 25.70 + ? = 100
  26. 26.48 + ? = 100
  27. 27.1 + ? = 10
  28. 28.29 + ? = 100
  29. 29.76 + ? = 100
  30. 30.22 + ? = 100
  31. 31.82 + ? = 100
  32. 32.8 + ? = 10
  33. 33.18 + ? = 100
  34. 34.11 + ? = 100
  35. 35.28 + ? = 100
  36. 36.71 + ? = 100
  37. 37.14 + ? = 100
  38. 38.45 + ? = 100
  39. 39.84 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 73
  2. 88
  3. 53
  4. 43
  5. 4
  6. 5
  7. 7
  8. 40
  9. 3
  10. 6
  11. 35
  12. 47
  13. 1
  14. 23
  15. 14
  16. 28
  17. 59
  18. 84
  19. 8
  20. 49
  21. 45
  22. 22
  23. 46
  24. 77
  25. 30
  26. 52
  27. 9
  28. 71
  29. 24
  30. 78
  31. 18
  32. 2
  33. 82
  34. 89
  35. 72
  36. 29
  37. 86
  38. 55
  39. 16
  40. 57

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