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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 954 · 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. 1.52 + ? = 100
  2. 2.19 + ? = 100
  3. 3.2 + ? = 10
  4. 4.16 + ? = 100
  5. 5.59 + ? = 100
  6. 6.29 + ? = 100
  7. 7.3 + ? = 10
  8. 8.6 + ? = 10
  9. 9.8 + ? = 10
  10. 10.25 + ? = 100
  11. 11.74 + ? = 100
  12. 12.43 + ? = 100
  13. 13.62 + ? = 100
  14. 14.9 + ? = 10
  15. 15.5 + ? = 10
  16. 16.78 + ? = 100
  17. 17.7 + ? = 10
  18. 18.1 + ? = 10
  19. 19.53 + ? = 100
  20. 20.4 + ? = 10
  21. 21.46 + ? = 100
  22. 22.60 + ? = 100
  23. 23.69 + ? = 100
  24. 24.27 + ? = 100
  25. 25.56 + ? = 100
  26. 26.23 + ? = 100
  27. 27.51 + ? = 100
  28. 28.39 + ? = 100
  29. 29.32 + ? = 100
  30. 30.80 + ? = 100
  31. 31.57 + ? = 100
  32. 32.87 + ? = 100
  33. 33.13 + ? = 100
  34. 34.75 + ? = 100
  35. 35.85 + ? = 100
  36. 36.15 + ? = 100
  37. 37.88 + ? = 100
  38. 38.22 + ? = 100
  39. 39.14 + ? = 100
  40. 40.21 + ? = 100

Answer key

  1. 48
  2. 81
  3. 8
  4. 84
  5. 41
  6. 71
  7. 7
  8. 4
  9. 2
  10. 75
  11. 26
  12. 57
  13. 38
  14. 1
  15. 5
  16. 22
  17. 3
  18. 9
  19. 47
  20. 6
  21. 54
  22. 40
  23. 31
  24. 73
  25. 44
  26. 77
  27. 49
  28. 61
  29. 68
  30. 20
  31. 43
  32. 13
  33. 87
  34. 25
  35. 15
  36. 85
  37. 12
  38. 78
  39. 86
  40. 79

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