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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 888 · 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. 1.23 + ? = 100
  2. 2.52 + ? = 100
  3. 3.14 + ? = 100
  4. 4.76 + ? = 100
  5. 5.20 + ? = 100
  6. 6.4 + ? = 10
  7. 7.36 + ? = 100
  8. 8.67 + ? = 100
  9. 9.7 + ? = 10
  10. 10.2 + ? = 10
  11. 11.43 + ? = 100
  12. 12.59 + ? = 100
  13. 13.9 + ? = 10
  14. 14.64 + ? = 100
  15. 15.54 + ? = 100
  16. 16.55 + ? = 100
  17. 17.65 + ? = 100
  18. 18.37 + ? = 100
  19. 19.63 + ? = 100
  20. 20.57 + ? = 100
  21. 21.86 + ? = 100
  22. 22.3 + ? = 10
  23. 23.38 + ? = 100
  24. 24.6 + ? = 10
  25. 25.31 + ? = 100
  26. 26.85 + ? = 100
  27. 27.8 + ? = 10
  28. 28.61 + ? = 100
  29. 29.16 + ? = 100
  30. 30.29 + ? = 100
  31. 31.1 + ? = 10
  32. 32.33 + ? = 100
  33. 33.71 + ? = 100
  34. 34.5 + ? = 10
  35. 35.80 + ? = 100
  36. 36.66 + ? = 100
  37. 37.26 + ? = 100
  38. 38.48 + ? = 100
  39. 39.6 + ? = 10
  40. 40.88 + ? = 100

Answer key

  1. 77
  2. 48
  3. 86
  4. 24
  5. 80
  6. 6
  7. 64
  8. 33
  9. 3
  10. 8
  11. 57
  12. 41
  13. 1
  14. 36
  15. 46
  16. 45
  17. 35
  18. 63
  19. 37
  20. 43
  21. 14
  22. 7
  23. 62
  24. 4
  25. 69
  26. 15
  27. 2
  28. 39
  29. 84
  30. 71
  31. 9
  32. 67
  33. 29
  34. 5
  35. 20
  36. 34
  37. 74
  38. 52
  39. 4
  40. 12

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