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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 901 · 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. 1.31 + ? = 100
  2. 2.1 + ? = 10
  3. 3.8 + ? = 10
  4. 4.67 + ? = 100
  5. 5.5 + ? = 10
  6. 6.29 + ? = 100
  7. 7.27 + ? = 100
  8. 8.2 + ? = 10
  9. 9.6 + ? = 10
  10. 10.16 + ? = 100
  11. 11.47 + ? = 100
  12. 12.82 + ? = 100
  13. 13.77 + ? = 100
  14. 14.12 + ? = 100
  15. 15.21 + ? = 100
  16. 16.7 + ? = 10
  17. 17.51 + ? = 100
  18. 18.4 + ? = 10
  19. 19.58 + ? = 100
  20. 20.70 + ? = 100
  21. 21.69 + ? = 100
  22. 22.32 + ? = 100
  23. 23.74 + ? = 100
  24. 24.52 + ? = 100
  25. 25.35 + ? = 100
  26. 26.80 + ? = 100
  27. 27.86 + ? = 100
  28. 28.61 + ? = 100
  29. 29.89 + ? = 100
  30. 30.49 + ? = 100
  31. 31.33 + ? = 100
  32. 32.38 + ? = 100
  33. 33.66 + ? = 100
  34. 34.37 + ? = 100
  35. 35.19 + ? = 100
  36. 36.75 + ? = 100
  37. 37.76 + ? = 100
  38. 38.65 + ? = 100
  39. 39.45 + ? = 100
  40. 40.9 + ? = 10

Answer key

  1. 69
  2. 9
  3. 2
  4. 33
  5. 5
  6. 71
  7. 73
  8. 8
  9. 4
  10. 84
  11. 53
  12. 18
  13. 23
  14. 88
  15. 79
  16. 3
  17. 49
  18. 6
  19. 42
  20. 30
  21. 31
  22. 68
  23. 26
  24. 48
  25. 65
  26. 20
  27. 14
  28. 39
  29. 11
  30. 51
  31. 67
  32. 62
  33. 34
  34. 63
  35. 81
  36. 25
  37. 24
  38. 35
  39. 55
  40. 1

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