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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 986 · 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. 2.7 + ? = 10
  3. 3.6 + ? = 10
  4. 4.19 + ? = 100
  5. 5.59 + ? = 100
  6. 6.84 + ? = 100
  7. 7.1 + ? = 10
  8. 8.5 + ? = 10
  9. 9.30 + ? = 100
  10. 10.25 + ? = 100
  11. 11.55 + ? = 100
  12. 12.4 + ? = 10
  13. 13.40 + ? = 100
  14. 14.31 + ? = 100
  15. 15.2 + ? = 10
  16. 16.15 + ? = 100
  17. 17.46 + ? = 100
  18. 18.89 + ? = 100
  19. 19.8 + ? = 10
  20. 20.51 + ? = 100
  21. 21.70 + ? = 100
  22. 22.3 + ? = 10
  23. 23.11 + ? = 100
  24. 24.39 + ? = 100
  25. 25.85 + ? = 100
  26. 26.72 + ? = 100
  27. 27.74 + ? = 100
  28. 28.38 + ? = 100
  29. 29.45 + ? = 100
  30. 30.52 + ? = 100
  31. 31.82 + ? = 100
  32. 32.68 + ? = 100
  33. 33.41 + ? = 100
  34. 34.78 + ? = 100
  35. 35.65 + ? = 100
  36. 36.13 + ? = 100
  37. 37.29 + ? = 100
  38. 38.76 + ? = 100
  39. 39.63 + ? = 100
  40. 40.69 + ? = 100

Answer key

  1. 1
  2. 3
  3. 4
  4. 81
  5. 41
  6. 16
  7. 9
  8. 5
  9. 70
  10. 75
  11. 45
  12. 6
  13. 60
  14. 69
  15. 8
  16. 85
  17. 54
  18. 11
  19. 2
  20. 49
  21. 30
  22. 7
  23. 89
  24. 61
  25. 15
  26. 28
  27. 26
  28. 62
  29. 55
  30. 48
  31. 18
  32. 32
  33. 59
  34. 22
  35. 35
  36. 87
  37. 71
  38. 24
  39. 37
  40. 31

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