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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 944 · 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. 1.78 + ? = 100
  2. 2.3 + ? = 10
  3. 3.89 + ? = 100
  4. 4.80 + ? = 100
  5. 5.12 + ? = 100
  6. 6.18 + ? = 100
  7. 7.7 + ? = 10
  8. 8.20 + ? = 100
  9. 9.2 + ? = 10
  10. 10.4 + ? = 10
  11. 11.5 + ? = 10
  12. 12.8 + ? = 10
  13. 13.6 + ? = 10
  14. 14.67 + ? = 100
  15. 15.31 + ? = 100
  16. 16.24 + ? = 100
  17. 17.46 + ? = 100
  18. 18.54 + ? = 100
  19. 19.55 + ? = 100
  20. 20.48 + ? = 100
  21. 21.57 + ? = 100
  22. 22.37 + ? = 100
  23. 23.72 + ? = 100
  24. 24.69 + ? = 100
  25. 25.74 + ? = 100
  26. 26.73 + ? = 100
  27. 27.1 + ? = 10
  28. 28.38 + ? = 100
  29. 29.60 + ? = 100
  30. 30.43 + ? = 100
  31. 31.71 + ? = 100
  32. 32.52 + ? = 100
  33. 33.42 + ? = 100
  34. 34.44 + ? = 100
  35. 35.35 + ? = 100
  36. 36.22 + ? = 100
  37. 37.70 + ? = 100
  38. 38.40 + ? = 100
  39. 39.47 + ? = 100
  40. 40.50 + ? = 100

Answer key

  1. 22
  2. 7
  3. 11
  4. 20
  5. 88
  6. 82
  7. 3
  8. 80
  9. 8
  10. 6
  11. 5
  12. 2
  13. 4
  14. 33
  15. 69
  16. 76
  17. 54
  18. 46
  19. 45
  20. 52
  21. 43
  22. 63
  23. 28
  24. 31
  25. 26
  26. 27
  27. 9
  28. 62
  29. 40
  30. 57
  31. 29
  32. 48
  33. 58
  34. 56
  35. 65
  36. 78
  37. 30
  38. 60
  39. 53
  40. 50

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