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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 671 · 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. 1.40 + ? = 100
  2. 2.19 + ? = 100
  3. 3.2 + ? = 10
  4. 4.56 + ? = 100
  5. 5.81 + ? = 100
  6. 6.9 + ? = 10
  7. 7.46 + ? = 100
  8. 8.1 + ? = 10
  9. 9.7 + ? = 10
  10. 10.18 + ? = 100
  11. 11.68 + ? = 100
  12. 12.14 + ? = 100
  13. 13.8 + ? = 10
  14. 14.31 + ? = 100
  15. 15.5 + ? = 10
  16. 16.28 + ? = 100
  17. 17.16 + ? = 100
  18. 18.60 + ? = 100
  19. 19.72 + ? = 100
  20. 20.71 + ? = 100
  21. 21.3 + ? = 10
  22. 22.62 + ? = 100
  23. 23.15 + ? = 100
  24. 24.55 + ? = 100
  25. 25.65 + ? = 100
  26. 26.88 + ? = 100
  27. 27.36 + ? = 100
  28. 28.85 + ? = 100
  29. 29.4 + ? = 10
  30. 30.13 + ? = 100
  31. 31.67 + ? = 100
  32. 32.69 + ? = 100
  33. 33.6 + ? = 10
  34. 34.24 + ? = 100
  35. 35.77 + ? = 100
  36. 36.11 + ? = 100
  37. 37.51 + ? = 100
  38. 38.30 + ? = 100
  39. 39.12 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 60
  2. 81
  3. 8
  4. 44
  5. 19
  6. 1
  7. 54
  8. 9
  9. 3
  10. 82
  11. 32
  12. 86
  13. 2
  14. 69
  15. 5
  16. 72
  17. 84
  18. 40
  19. 28
  20. 29
  21. 7
  22. 38
  23. 85
  24. 45
  25. 35
  26. 12
  27. 64
  28. 15
  29. 6
  30. 87
  31. 33
  32. 31
  33. 4
  34. 76
  35. 23
  36. 89
  37. 49
  38. 70
  39. 88
  40. 52

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