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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 580 · 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. 1.54 + ? = 100
  2. 2.2 + ? = 10
  3. 3.78 + ? = 100
  4. 4.8 + ? = 10
  5. 5.69 + ? = 100
  6. 6.77 + ? = 100
  7. 7.34 + ? = 100
  8. 8.24 + ? = 100
  9. 9.6 + ? = 10
  10. 10.15 + ? = 100
  11. 11.13 + ? = 100
  12. 12.65 + ? = 100
  13. 13.4 + ? = 10
  14. 14.86 + ? = 100
  15. 15.82 + ? = 100
  16. 16.3 + ? = 10
  17. 17.32 + ? = 100
  18. 18.81 + ? = 100
  19. 19.51 + ? = 100
  20. 20.26 + ? = 100
  21. 21.50 + ? = 100
  22. 22.74 + ? = 100
  23. 23.14 + ? = 100
  24. 24.87 + ? = 100
  25. 25.5 + ? = 10
  26. 26.9 + ? = 10
  27. 27.11 + ? = 100
  28. 28.19 + ? = 100
  29. 29.1 + ? = 10
  30. 30.67 + ? = 100
  31. 31.7 + ? = 10
  32. 32.62 + ? = 100
  33. 33.76 + ? = 100
  34. 34.21 + ? = 100
  35. 35.53 + ? = 100
  36. 36.20 + ? = 100
  37. 37.48 + ? = 100
  38. 38.63 + ? = 100
  39. 39.84 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 46
  2. 8
  3. 22
  4. 2
  5. 31
  6. 23
  7. 66
  8. 76
  9. 4
  10. 85
  11. 87
  12. 35
  13. 6
  14. 14
  15. 18
  16. 7
  17. 68
  18. 19
  19. 49
  20. 74
  21. 50
  22. 26
  23. 86
  24. 13
  25. 5
  26. 1
  27. 89
  28. 81
  29. 9
  30. 33
  31. 3
  32. 38
  33. 24
  34. 79
  35. 47
  36. 80
  37. 52
  38. 37
  39. 16
  40. 15

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