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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 46 · 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. 1.9 + ? = 10
  2. 2.4 + ? = 10
  3. 3.2 + ? = 10
  4. 4.63 + ? = 100
  5. 5.67 + ? = 100
  6. 6.81 + ? = 100
  7. 7.84 + ? = 100
  8. 8.8 + ? = 10
  9. 9.1 + ? = 10
  10. 10.27 + ? = 100
  11. 11.64 + ? = 100
  12. 12.31 + ? = 100
  13. 13.71 + ? = 100
  14. 14.13 + ? = 100
  15. 15.6 + ? = 10
  16. 16.3 + ? = 10
  17. 17.88 + ? = 100
  18. 18.7 + ? = 10
  19. 19.72 + ? = 100
  20. 20.51 + ? = 100
  21. 21.11 + ? = 100
  22. 22.33 + ? = 100
  23. 23.20 + ? = 100
  24. 24.46 + ? = 100
  25. 25.86 + ? = 100
  26. 26.39 + ? = 100
  27. 27.5 + ? = 10
  28. 28.45 + ? = 100
  29. 29.50 + ? = 100
  30. 30.40 + ? = 100
  31. 31.56 + ? = 100
  32. 32.34 + ? = 100
  33. 33.83 + ? = 100
  34. 34.55 + ? = 100
  35. 35.60 + ? = 100
  36. 36.61 + ? = 100
  37. 37.54 + ? = 100
  38. 38.76 + ? = 100
  39. 39.42 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 1
  2. 6
  3. 8
  4. 37
  5. 33
  6. 19
  7. 16
  8. 2
  9. 9
  10. 73
  11. 36
  12. 69
  13. 29
  14. 87
  15. 4
  16. 7
  17. 12
  18. 3
  19. 28
  20. 49
  21. 89
  22. 67
  23. 80
  24. 54
  25. 14
  26. 61
  27. 5
  28. 55
  29. 50
  30. 60
  31. 44
  32. 66
  33. 17
  34. 45
  35. 40
  36. 39
  37. 46
  38. 24
  39. 58
  40. 70

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