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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 394 · 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. 1.44 + ? = 100
  2. 2.5 + ? = 10
  3. 3.50 + ? = 100
  4. 4.84 + ? = 100
  5. 5.34 + ? = 100
  6. 6.3 + ? = 10
  7. 7.2 + ? = 10
  8. 8.8 + ? = 10
  9. 9.23 + ? = 100
  10. 10.4 + ? = 10
  11. 11.9 + ? = 10
  12. 12.78 + ? = 100
  13. 13.1 + ? = 10
  14. 14.66 + ? = 100
  15. 15.7 + ? = 10
  16. 16.40 + ? = 100
  17. 17.41 + ? = 100
  18. 18.6 + ? = 10
  19. 19.46 + ? = 100
  20. 20.72 + ? = 100
  21. 21.59 + ? = 100
  22. 22.58 + ? = 100
  23. 23.21 + ? = 100
  24. 24.53 + ? = 100
  25. 25.42 + ? = 100
  26. 26.30 + ? = 100
  27. 27.77 + ? = 100
  28. 28.73 + ? = 100
  29. 29.74 + ? = 100
  30. 30.17 + ? = 100
  31. 31.51 + ? = 100
  32. 32.71 + ? = 100
  33. 33.45 + ? = 100
  34. 34.14 + ? = 100
  35. 35.20 + ? = 100
  36. 36.26 + ? = 100
  37. 37.29 + ? = 100
  38. 38.32 + ? = 100
  39. 39.86 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 56
  2. 5
  3. 50
  4. 16
  5. 66
  6. 7
  7. 8
  8. 2
  9. 77
  10. 6
  11. 1
  12. 22
  13. 9
  14. 34
  15. 3
  16. 60
  17. 59
  18. 4
  19. 54
  20. 28
  21. 41
  22. 42
  23. 79
  24. 47
  25. 58
  26. 70
  27. 23
  28. 27
  29. 26
  30. 83
  31. 49
  32. 29
  33. 55
  34. 86
  35. 80
  36. 74
  37. 71
  38. 68
  39. 14
  40. 13

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