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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 772 · 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. 1.75 + ? = 100
  2. 2.53 + ? = 100
  3. 3.3 + ? = 10
  4. 4.82 + ? = 100
  5. 5.1 + ? = 10
  6. 6.7 + ? = 10
  7. 7.38 + ? = 100
  8. 8.28 + ? = 100
  9. 9.13 + ? = 100
  10. 10.63 + ? = 100
  11. 11.84 + ? = 100
  12. 12.8 + ? = 10
  13. 13.67 + ? = 100
  14. 14.9 + ? = 10
  15. 15.4 + ? = 10
  16. 16.2 + ? = 10
  17. 17.14 + ? = 100
  18. 18.61 + ? = 100
  19. 19.57 + ? = 100
  20. 20.6 + ? = 10
  21. 21.36 + ? = 100
  22. 22.46 + ? = 100
  23. 23.86 + ? = 100
  24. 24.20 + ? = 100
  25. 25.52 + ? = 100
  26. 26.80 + ? = 100
  27. 27.15 + ? = 100
  28. 28.12 + ? = 100
  29. 29.56 + ? = 100
  30. 30.5 + ? = 10
  31. 31.77 + ? = 100
  32. 32.47 + ? = 100
  33. 33.21 + ? = 100
  34. 34.81 + ? = 100
  35. 35.66 + ? = 100
  36. 36.58 + ? = 100
  37. 37.76 + ? = 100
  38. 38.22 + ? = 100
  39. 39.19 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 25
  2. 47
  3. 7
  4. 18
  5. 9
  6. 3
  7. 62
  8. 72
  9. 87
  10. 37
  11. 16
  12. 2
  13. 33
  14. 1
  15. 6
  16. 8
  17. 86
  18. 39
  19. 43
  20. 4
  21. 64
  22. 54
  23. 14
  24. 80
  25. 48
  26. 20
  27. 85
  28. 88
  29. 44
  30. 5
  31. 23
  32. 53
  33. 79
  34. 19
  35. 34
  36. 42
  37. 24
  38. 78
  39. 81
  40. 26

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