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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 988 · 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. 1.9 + ? = 10
  2. 2.23 + ? = 100
  3. 3.42 + ? = 100
  4. 4.3 + ? = 10
  5. 5.53 + ? = 100
  6. 6.13 + ? = 100
  7. 7.7 + ? = 10
  8. 8.1 + ? = 10
  9. 9.4 + ? = 10
  10. 10.16 + ? = 100
  11. 11.5 + ? = 10
  12. 12.2 + ? = 10
  13. 13.66 + ? = 100
  14. 14.64 + ? = 100
  15. 15.82 + ? = 100
  16. 16.77 + ? = 100
  17. 17.6 + ? = 10
  18. 18.8 + ? = 10
  19. 19.29 + ? = 100
  20. 20.67 + ? = 100
  21. 21.58 + ? = 100
  22. 22.19 + ? = 100
  23. 23.28 + ? = 100
  24. 24.37 + ? = 100
  25. 25.14 + ? = 100
  26. 26.41 + ? = 100
  27. 27.57 + ? = 100
  28. 28.51 + ? = 100
  29. 29.43 + ? = 100
  30. 30.84 + ? = 100
  31. 31.52 + ? = 100
  32. 32.24 + ? = 100
  33. 33.48 + ? = 100
  34. 34.36 + ? = 100
  35. 35.31 + ? = 100
  36. 36.30 + ? = 100
  37. 37.44 + ? = 100
  38. 38.75 + ? = 100
  39. 39.62 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 1
  2. 77
  3. 58
  4. 7
  5. 47
  6. 87
  7. 3
  8. 9
  9. 6
  10. 84
  11. 5
  12. 8
  13. 34
  14. 36
  15. 18
  16. 23
  17. 4
  18. 2
  19. 71
  20. 33
  21. 42
  22. 81
  23. 72
  24. 63
  25. 86
  26. 59
  27. 43
  28. 49
  29. 57
  30. 16
  31. 48
  32. 76
  33. 52
  34. 64
  35. 69
  36. 70
  37. 56
  38. 25
  39. 38
  40. 85

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