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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 711 · 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. 1.32 + ? = 100
  2. 2.42 + ? = 100
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.52 + ? = 100
  6. 6.9 + ? = 10
  7. 7.51 + ? = 100
  8. 8.45 + ? = 100
  9. 9.54 + ? = 100
  10. 10.8 + ? = 10
  11. 11.1 + ? = 10
  12. 12.46 + ? = 100
  13. 13.82 + ? = 100
  14. 14.21 + ? = 100
  15. 15.13 + ? = 100
  16. 16.29 + ? = 100
  17. 17.31 + ? = 100
  18. 18.44 + ? = 100
  19. 19.64 + ? = 100
  20. 20.11 + ? = 100
  21. 21.41 + ? = 100
  22. 22.27 + ? = 100
  23. 23.16 + ? = 100
  24. 24.55 + ? = 100
  25. 25.7 + ? = 10
  26. 26.30 + ? = 100
  27. 27.63 + ? = 100
  28. 28.3 + ? = 10
  29. 29.2 + ? = 10
  30. 30.19 + ? = 100
  31. 31.48 + ? = 100
  32. 32.23 + ? = 100
  33. 33.34 + ? = 100
  34. 34.24 + ? = 100
  35. 35.58 + ? = 100
  36. 36.61 + ? = 100
  37. 37.78 + ? = 100
  38. 38.84 + ? = 100
  39. 39.47 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 68
  2. 58
  3. 6
  4. 5
  5. 48
  6. 1
  7. 49
  8. 55
  9. 46
  10. 2
  11. 9
  12. 54
  13. 18
  14. 79
  15. 87
  16. 71
  17. 69
  18. 56
  19. 36
  20. 89
  21. 59
  22. 73
  23. 84
  24. 45
  25. 3
  26. 70
  27. 37
  28. 7
  29. 8
  30. 81
  31. 52
  32. 77
  33. 66
  34. 76
  35. 42
  36. 39
  37. 22
  38. 16
  39. 53
  40. 24

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