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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 948 · 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. 2.21 + ? = 100
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.25 + ? = 100
  6. 6.45 + ? = 100
  7. 7.64 + ? = 100
  8. 8.14 + ? = 100
  9. 9.6 + ? = 10
  10. 10.15 + ? = 100
  11. 11.7 + ? = 10
  12. 12.32 + ? = 100
  13. 13.18 + ? = 100
  14. 14.35 + ? = 100
  15. 15.3 + ? = 10
  16. 16.2 + ? = 10
  17. 17.53 + ? = 100
  18. 18.55 + ? = 100
  19. 19.8 + ? = 10
  20. 20.46 + ? = 100
  21. 21.37 + ? = 100
  22. 22.82 + ? = 100
  23. 23.57 + ? = 100
  24. 24.50 + ? = 100
  25. 25.85 + ? = 100
  26. 26.70 + ? = 100
  27. 27.58 + ? = 100
  28. 28.87 + ? = 100
  29. 29.28 + ? = 100
  30. 30.13 + ? = 100
  31. 31.60 + ? = 100
  32. 32.47 + ? = 100
  33. 33.11 + ? = 100
  34. 34.68 + ? = 100
  35. 35.61 + ? = 100
  36. 36.71 + ? = 100
  37. 37.33 + ? = 100
  38. 38.9 + ? = 10
  39. 39.44 + ? = 100
  40. 40.22 + ? = 100

Answer key

  1. 9
  2. 79
  3. 6
  4. 5
  5. 75
  6. 55
  7. 36
  8. 86
  9. 4
  10. 85
  11. 3
  12. 68
  13. 82
  14. 65
  15. 7
  16. 8
  17. 47
  18. 45
  19. 2
  20. 54
  21. 63
  22. 18
  23. 43
  24. 50
  25. 15
  26. 30
  27. 42
  28. 13
  29. 72
  30. 87
  31. 40
  32. 53
  33. 89
  34. 32
  35. 39
  36. 29
  37. 67
  38. 1
  39. 56
  40. 78

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