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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 460 · 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. 2.3 + ? = 10
  3. 3.89 + ? = 100
  4. 4.34 + ? = 100
  5. 5.1 + ? = 10
  6. 6.8 + ? = 10
  7. 7.15 + ? = 100
  8. 8.7 + ? = 10
  9. 9.24 + ? = 100
  10. 10.74 + ? = 100
  11. 11.9 + ? = 10
  12. 12.41 + ? = 100
  13. 13.88 + ? = 100
  14. 14.43 + ? = 100
  15. 15.65 + ? = 100
  16. 16.6 + ? = 10
  17. 17.5 + ? = 10
  18. 18.62 + ? = 100
  19. 19.2 + ? = 10
  20. 20.45 + ? = 100
  21. 21.31 + ? = 100
  22. 22.40 + ? = 100
  23. 23.18 + ? = 100
  24. 24.70 + ? = 100
  25. 25.56 + ? = 100
  26. 26.38 + ? = 100
  27. 27.11 + ? = 100
  28. 28.21 + ? = 100
  29. 29.80 + ? = 100
  30. 30.27 + ? = 100
  31. 31.30 + ? = 100
  32. 32.33 + ? = 100
  33. 33.23 + ? = 100
  34. 34.35 + ? = 100
  35. 35.85 + ? = 100
  36. 36.84 + ? = 100
  37. 37.76 + ? = 100
  38. 38.64 + ? = 100
  39. 39.72 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 6
  2. 7
  3. 11
  4. 66
  5. 9
  6. 2
  7. 85
  8. 3
  9. 76
  10. 26
  11. 1
  12. 59
  13. 12
  14. 57
  15. 35
  16. 4
  17. 5
  18. 38
  19. 8
  20. 55
  21. 69
  22. 60
  23. 82
  24. 30
  25. 44
  26. 62
  27. 89
  28. 79
  29. 20
  30. 73
  31. 70
  32. 67
  33. 77
  34. 65
  35. 15
  36. 16
  37. 24
  38. 36
  39. 28
  40. 42

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