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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 436 · 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. 1.4 + ? = 10
  2. 2.89 + ? = 100
  3. 3.40 + ? = 100
  4. 4.26 + ? = 100
  5. 5.6 + ? = 10
  6. 6.79 + ? = 100
  7. 7.7 + ? = 10
  8. 8.3 + ? = 10
  9. 9.12 + ? = 100
  10. 10.76 + ? = 100
  11. 11.21 + ? = 100
  12. 12.82 + ? = 100
  13. 13.77 + ? = 100
  14. 14.1 + ? = 10
  15. 15.56 + ? = 100
  16. 16.69 + ? = 100
  17. 17.52 + ? = 100
  18. 18.9 + ? = 10
  19. 19.15 + ? = 100
  20. 20.8 + ? = 10
  21. 21.54 + ? = 100
  22. 22.60 + ? = 100
  23. 23.66 + ? = 100
  24. 24.32 + ? = 100
  25. 25.27 + ? = 100
  26. 26.51 + ? = 100
  27. 27.88 + ? = 100
  28. 28.31 + ? = 100
  29. 29.16 + ? = 100
  30. 30.2 + ? = 10
  31. 31.48 + ? = 100
  32. 32.22 + ? = 100
  33. 33.45 + ? = 100
  34. 34.5 + ? = 10
  35. 35.67 + ? = 100
  36. 36.84 + ? = 100
  37. 37.14 + ? = 100
  38. 38.87 + ? = 100
  39. 39.11 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 6
  2. 11
  3. 60
  4. 74
  5. 4
  6. 21
  7. 3
  8. 7
  9. 88
  10. 24
  11. 79
  12. 18
  13. 23
  14. 9
  15. 44
  16. 31
  17. 48
  18. 1
  19. 85
  20. 2
  21. 46
  22. 40
  23. 34
  24. 68
  25. 73
  26. 49
  27. 12
  28. 69
  29. 84
  30. 8
  31. 52
  32. 78
  33. 55
  34. 5
  35. 33
  36. 16
  37. 86
  38. 13
  39. 89
  40. 32

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