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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 768 · 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. 1.1 + ? = 10
  2. 2.51 + ? = 100
  3. 3.4 + ? = 10
  4. 4.79 + ? = 100
  5. 5.31 + ? = 100
  6. 6.6 + ? = 10
  7. 7.38 + ? = 100
  8. 8.9 + ? = 10
  9. 9.7 + ? = 10
  10. 10.86 + ? = 100
  11. 11.8 + ? = 10
  12. 12.41 + ? = 100
  13. 13.58 + ? = 100
  14. 14.59 + ? = 100
  15. 15.42 + ? = 100
  16. 16.48 + ? = 100
  17. 17.2 + ? = 10
  18. 18.80 + ? = 100
  19. 19.74 + ? = 100
  20. 20.46 + ? = 100
  21. 21.75 + ? = 100
  22. 22.34 + ? = 100
  23. 23.72 + ? = 100
  24. 24.15 + ? = 100
  25. 25.63 + ? = 100
  26. 26.11 + ? = 100
  27. 27.49 + ? = 100
  28. 28.62 + ? = 100
  29. 29.28 + ? = 100
  30. 30.3 + ? = 10
  31. 31.40 + ? = 100
  32. 32.5 + ? = 10
  33. 33.14 + ? = 100
  34. 34.25 + ? = 100
  35. 35.73 + ? = 100
  36. 36.65 + ? = 100
  37. 37.27 + ? = 100
  38. 38.68 + ? = 100
  39. 39.84 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 9
  2. 49
  3. 6
  4. 21
  5. 69
  6. 4
  7. 62
  8. 1
  9. 3
  10. 14
  11. 2
  12. 59
  13. 42
  14. 41
  15. 58
  16. 52
  17. 8
  18. 20
  19. 26
  20. 54
  21. 25
  22. 66
  23. 28
  24. 85
  25. 37
  26. 89
  27. 51
  28. 38
  29. 72
  30. 7
  31. 60
  32. 5
  33. 86
  34. 75
  35. 27
  36. 35
  37. 73
  38. 32
  39. 16
  40. 17

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