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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 959 · 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. 1.78 + ? = 100
  2. 2.63 + ? = 100
  3. 3.4 + ? = 10
  4. 4.15 + ? = 100
  5. 5.5 + ? = 10
  6. 6.26 + ? = 100
  7. 7.8 + ? = 10
  8. 8.7 + ? = 10
  9. 9.60 + ? = 100
  10. 10.6 + ? = 10
  11. 11.3 + ? = 10
  12. 12.89 + ? = 100
  13. 13.11 + ? = 100
  14. 14.64 + ? = 100
  15. 15.13 + ? = 100
  16. 16.31 + ? = 100
  17. 17.18 + ? = 100
  18. 18.73 + ? = 100
  19. 19.53 + ? = 100
  20. 20.1 + ? = 10
  21. 21.88 + ? = 100
  22. 22.87 + ? = 100
  23. 23.52 + ? = 100
  24. 24.79 + ? = 100
  25. 25.85 + ? = 100
  26. 26.25 + ? = 100
  27. 27.9 + ? = 10
  28. 28.75 + ? = 100
  29. 29.67 + ? = 100
  30. 30.2 + ? = 10
  31. 31.20 + ? = 100
  32. 32.34 + ? = 100
  33. 33.65 + ? = 100
  34. 34.40 + ? = 100
  35. 35.82 + ? = 100
  36. 36.57 + ? = 100
  37. 37.86 + ? = 100
  38. 38.27 + ? = 100
  39. 39.23 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 22
  2. 37
  3. 6
  4. 85
  5. 5
  6. 74
  7. 2
  8. 3
  9. 40
  10. 4
  11. 7
  12. 11
  13. 89
  14. 36
  15. 87
  16. 69
  17. 82
  18. 27
  19. 47
  20. 9
  21. 12
  22. 13
  23. 48
  24. 21
  25. 15
  26. 75
  27. 1
  28. 25
  29. 33
  30. 8
  31. 80
  32. 66
  33. 35
  34. 60
  35. 18
  36. 43
  37. 14
  38. 73
  39. 77
  40. 81

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