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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 854 · 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. 1.40 + ? = 100
  2. 2.5 + ? = 10
  3. 3.27 + ? = 100
  4. 4.7 + ? = 10
  5. 5.34 + ? = 100
  6. 6.35 + ? = 100
  7. 7.1 + ? = 10
  8. 8.11 + ? = 100
  9. 9.59 + ? = 100
  10. 10.76 + ? = 100
  11. 11.9 + ? = 10
  12. 12.20 + ? = 100
  13. 13.8 + ? = 10
  14. 14.28 + ? = 100
  15. 15.55 + ? = 100
  16. 16.29 + ? = 100
  17. 17.37 + ? = 100
  18. 18.2 + ? = 10
  19. 19.3 + ? = 10
  20. 20.16 + ? = 100
  21. 21.32 + ? = 100
  22. 22.15 + ? = 100
  23. 23.36 + ? = 100
  24. 24.18 + ? = 100
  25. 25.83 + ? = 100
  26. 26.69 + ? = 100
  27. 27.4 + ? = 10
  28. 28.74 + ? = 100
  29. 29.19 + ? = 100
  30. 30.62 + ? = 100
  31. 31.51 + ? = 100
  32. 32.65 + ? = 100
  33. 33.12 + ? = 100
  34. 34.82 + ? = 100
  35. 35.58 + ? = 100
  36. 36.84 + ? = 100
  37. 37.57 + ? = 100
  38. 38.44 + ? = 100
  39. 39.30 + ? = 100
  40. 40.88 + ? = 100

Answer key

  1. 60
  2. 5
  3. 73
  4. 3
  5. 66
  6. 65
  7. 9
  8. 89
  9. 41
  10. 24
  11. 1
  12. 80
  13. 2
  14. 72
  15. 45
  16. 71
  17. 63
  18. 8
  19. 7
  20. 84
  21. 68
  22. 85
  23. 64
  24. 82
  25. 17
  26. 31
  27. 6
  28. 26
  29. 81
  30. 38
  31. 49
  32. 35
  33. 88
  34. 18
  35. 42
  36. 16
  37. 43
  38. 56
  39. 70
  40. 12

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