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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 894 · 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. 1.6 + ? = 10
  2. 2.77 + ? = 100
  3. 3.62 + ? = 100
  4. 4.2 + ? = 10
  5. 5.20 + ? = 100
  6. 6.50 + ? = 100
  7. 7.9 + ? = 10
  8. 8.60 + ? = 100
  9. 9.4 + ? = 10
  10. 10.85 + ? = 100
  11. 11.37 + ? = 100
  12. 12.27 + ? = 100
  13. 13.3 + ? = 10
  14. 14.40 + ? = 100
  15. 15.5 + ? = 10
  16. 16.32 + ? = 100
  17. 17.8 + ? = 10
  18. 18.29 + ? = 100
  19. 19.1 + ? = 10
  20. 20.17 + ? = 100
  21. 21.88 + ? = 100
  22. 22.57 + ? = 100
  23. 23.51 + ? = 100
  24. 24.78 + ? = 100
  25. 25.39 + ? = 100
  26. 26.7 + ? = 10
  27. 27.55 + ? = 100
  28. 28.80 + ? = 100
  29. 29.42 + ? = 100
  30. 30.73 + ? = 100
  31. 31.69 + ? = 100
  32. 32.76 + ? = 100
  33. 33.35 + ? = 100
  34. 34.79 + ? = 100
  35. 35.71 + ? = 100
  36. 36.25 + ? = 100
  37. 37.36 + ? = 100
  38. 38.61 + ? = 100
  39. 39.72 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 4
  2. 23
  3. 38
  4. 8
  5. 80
  6. 50
  7. 1
  8. 40
  9. 6
  10. 15
  11. 63
  12. 73
  13. 7
  14. 60
  15. 5
  16. 68
  17. 2
  18. 71
  19. 9
  20. 83
  21. 12
  22. 43
  23. 49
  24. 22
  25. 61
  26. 3
  27. 45
  28. 20
  29. 58
  30. 27
  31. 31
  32. 24
  33. 65
  34. 21
  35. 29
  36. 75
  37. 64
  38. 39
  39. 28
  40. 86

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