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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 993 · 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. 1.8 + ? = 10
  2. 2.11 + ? = 100
  3. 3.24 + ? = 100
  4. 4.15 + ? = 100
  5. 5.61 + ? = 100
  6. 6.86 + ? = 100
  7. 7.69 + ? = 100
  8. 8.71 + ? = 100
  9. 9.49 + ? = 100
  10. 10.4 + ? = 10
  11. 11.54 + ? = 100
  12. 12.5 + ? = 10
  13. 13.20 + ? = 100
  14. 14.9 + ? = 10
  15. 15.28 + ? = 100
  16. 16.2 + ? = 10
  17. 17.38 + ? = 100
  18. 18.43 + ? = 100
  19. 19.89 + ? = 100
  20. 20.7 + ? = 10
  21. 21.70 + ? = 100
  22. 22.76 + ? = 100
  23. 23.59 + ? = 100
  24. 24.37 + ? = 100
  25. 25.23 + ? = 100
  26. 26.55 + ? = 100
  27. 27.80 + ? = 100
  28. 28.31 + ? = 100
  29. 29.65 + ? = 100
  30. 30.83 + ? = 100
  31. 31.21 + ? = 100
  32. 32.6 + ? = 10
  33. 33.1 + ? = 10
  34. 34.62 + ? = 100
  35. 35.3 + ? = 10
  36. 36.41 + ? = 100
  37. 37.26 + ? = 100
  38. 38.87 + ? = 100
  39. 39.84 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 2
  2. 89
  3. 76
  4. 85
  5. 39
  6. 14
  7. 31
  8. 29
  9. 51
  10. 6
  11. 46
  12. 5
  13. 80
  14. 1
  15. 72
  16. 8
  17. 62
  18. 57
  19. 11
  20. 3
  21. 30
  22. 24
  23. 41
  24. 63
  25. 77
  26. 45
  27. 20
  28. 69
  29. 35
  30. 17
  31. 79
  32. 4
  33. 9
  34. 38
  35. 7
  36. 59
  37. 74
  38. 13
  39. 16
  40. 55

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