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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 266 · 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. 1.7 + ? = 10
  2. 2.30 + ? = 100
  3. 3.3 + ? = 10
  4. 4.48 + ? = 100
  5. 5.5 + ? = 10
  6. 6.9 + ? = 10
  7. 7.56 + ? = 100
  8. 8.43 + ? = 100
  9. 9.4 + ? = 10
  10. 10.76 + ? = 100
  11. 11.54 + ? = 100
  12. 12.14 + ? = 100
  13. 13.23 + ? = 100
  14. 14.28 + ? = 100
  15. 15.22 + ? = 100
  16. 16.67 + ? = 100
  17. 17.65 + ? = 100
  18. 18.20 + ? = 100
  19. 19.88 + ? = 100
  20. 20.61 + ? = 100
  21. 21.42 + ? = 100
  22. 22.37 + ? = 100
  23. 23.1 + ? = 10
  24. 24.8 + ? = 10
  25. 25.29 + ? = 100
  26. 26.2 + ? = 10
  27. 27.46 + ? = 100
  28. 28.64 + ? = 100
  29. 29.60 + ? = 100
  30. 30.21 + ? = 100
  31. 31.6 + ? = 10
  32. 32.19 + ? = 100
  33. 33.34 + ? = 100
  34. 34.35 + ? = 100
  35. 35.62 + ? = 100
  36. 36.16 + ? = 100
  37. 37.38 + ? = 100
  38. 38.70 + ? = 100
  39. 39.51 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 3
  2. 70
  3. 7
  4. 52
  5. 5
  6. 1
  7. 44
  8. 57
  9. 6
  10. 24
  11. 46
  12. 86
  13. 77
  14. 72
  15. 78
  16. 33
  17. 35
  18. 80
  19. 12
  20. 39
  21. 58
  22. 63
  23. 9
  24. 2
  25. 71
  26. 8
  27. 54
  28. 36
  29. 40
  30. 79
  31. 4
  32. 81
  33. 66
  34. 65
  35. 38
  36. 84
  37. 62
  38. 30
  39. 49
  40. 60

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