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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 877 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.1 + ? = 10
  4. 4.86 + ? = 100
  5. 5.4 + ? = 10
  6. 6.87 + ? = 100
  7. 7.5 + ? = 10
  8. 8.32 + ? = 100
  9. 9.28 + ? = 100
  10. 10.27 + ? = 100
  11. 11.2 + ? = 10
  12. 12.79 + ? = 100
  13. 13.3 + ? = 10
  14. 14.52 + ? = 100
  15. 15.77 + ? = 100
  16. 16.83 + ? = 100
  17. 17.82 + ? = 100
  18. 18.67 + ? = 100
  19. 19.11 + ? = 100
  20. 20.6 + ? = 10
  21. 21.37 + ? = 100
  22. 22.89 + ? = 100
  23. 23.84 + ? = 100
  24. 24.42 + ? = 100
  25. 25.49 + ? = 100
  26. 26.50 + ? = 100
  27. 27.76 + ? = 100
  28. 28.12 + ? = 100
  29. 29.8 + ? = 10
  30. 30.24 + ? = 100
  31. 31.58 + ? = 100
  32. 32.71 + ? = 100
  33. 33.70 + ? = 100
  34. 34.59 + ? = 100
  35. 35.74 + ? = 100
  36. 36.29 + ? = 100
  37. 37.63 + ? = 100
  38. 38.20 + ? = 100
  39. 39.19 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 3
  2. 1
  3. 9
  4. 14
  5. 6
  6. 13
  7. 5
  8. 68
  9. 72
  10. 73
  11. 8
  12. 21
  13. 7
  14. 48
  15. 23
  16. 17
  17. 18
  18. 33
  19. 89
  20. 4
  21. 63
  22. 11
  23. 16
  24. 58
  25. 51
  26. 50
  27. 24
  28. 88
  29. 2
  30. 76
  31. 42
  32. 29
  33. 30
  34. 41
  35. 26
  36. 71
  37. 37
  38. 80
  39. 81
  40. 52

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