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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 312 · 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. 1.3 + ? = 10
  2. 2.15 + ? = 100
  3. 3.8 + ? = 10
  4. 4.2 + ? = 10
  5. 5.30 + ? = 100
  6. 6.6 + ? = 10
  7. 7.79 + ? = 100
  8. 8.62 + ? = 100
  9. 9.4 + ? = 10
  10. 10.43 + ? = 100
  11. 11.23 + ? = 100
  12. 12.41 + ? = 100
  13. 13.7 + ? = 10
  14. 14.51 + ? = 100
  15. 15.21 + ? = 100
  16. 16.1 + ? = 10
  17. 17.52 + ? = 100
  18. 18.57 + ? = 100
  19. 19.22 + ? = 100
  20. 20.55 + ? = 100
  21. 21.29 + ? = 100
  22. 22.50 + ? = 100
  23. 23.34 + ? = 100
  24. 24.74 + ? = 100
  25. 25.18 + ? = 100
  26. 26.20 + ? = 100
  27. 27.44 + ? = 100
  28. 28.63 + ? = 100
  29. 29.69 + ? = 100
  30. 30.36 + ? = 100
  31. 31.54 + ? = 100
  32. 32.82 + ? = 100
  33. 33.33 + ? = 100
  34. 34.59 + ? = 100
  35. 35.9 + ? = 10
  36. 36.64 + ? = 100
  37. 37.61 + ? = 100
  38. 38.25 + ? = 100
  39. 39.13 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 7
  2. 85
  3. 2
  4. 8
  5. 70
  6. 4
  7. 21
  8. 38
  9. 6
  10. 57
  11. 77
  12. 59
  13. 3
  14. 49
  15. 79
  16. 9
  17. 48
  18. 43
  19. 78
  20. 45
  21. 71
  22. 50
  23. 66
  24. 26
  25. 82
  26. 80
  27. 56
  28. 37
  29. 31
  30. 64
  31. 46
  32. 18
  33. 67
  34. 41
  35. 1
  36. 36
  37. 39
  38. 75
  39. 87
  40. 17

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