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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 305 · 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. 1.6 + ? = 10
  2. 2.87 + ? = 100
  3. 3.86 + ? = 100
  4. 4.7 + ? = 10
  5. 5.3 + ? = 10
  6. 6.39 + ? = 100
  7. 7.9 + ? = 10
  8. 8.11 + ? = 100
  9. 9.30 + ? = 100
  10. 10.4 + ? = 10
  11. 11.14 + ? = 100
  12. 12.70 + ? = 100
  13. 13.80 + ? = 100
  14. 14.16 + ? = 100
  15. 15.34 + ? = 100
  16. 16.26 + ? = 100
  17. 17.53 + ? = 100
  18. 18.74 + ? = 100
  19. 19.69 + ? = 100
  20. 20.2 + ? = 10
  21. 21.85 + ? = 100
  22. 22.5 + ? = 10
  23. 23.77 + ? = 100
  24. 24.8 + ? = 10
  25. 25.46 + ? = 100
  26. 26.43 + ? = 100
  27. 27.79 + ? = 100
  28. 28.37 + ? = 100
  29. 29.59 + ? = 100
  30. 30.28 + ? = 100
  31. 31.1 + ? = 10
  32. 32.62 + ? = 100
  33. 33.24 + ? = 100
  34. 34.2 + ? = 10
  35. 35.12 + ? = 100
  36. 36.63 + ? = 100
  37. 37.88 + ? = 100
  38. 38.57 + ? = 100
  39. 39.51 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 4
  2. 13
  3. 14
  4. 3
  5. 7
  6. 61
  7. 1
  8. 89
  9. 70
  10. 6
  11. 86
  12. 30
  13. 20
  14. 84
  15. 66
  16. 74
  17. 47
  18. 26
  19. 31
  20. 8
  21. 15
  22. 5
  23. 23
  24. 2
  25. 54
  26. 57
  27. 21
  28. 63
  29. 41
  30. 72
  31. 9
  32. 38
  33. 76
  34. 8
  35. 88
  36. 37
  37. 12
  38. 43
  39. 49
  40. 45

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