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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 666 · 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. 2.11 + ? = 100
  3. 3.34 + ? = 100
  4. 4.28 + ? = 100
  5. 5.81 + ? = 100
  6. 6.60 + ? = 100
  7. 7.37 + ? = 100
  8. 8.64 + ? = 100
  9. 9.4 + ? = 10
  10. 10.5 + ? = 10
  11. 11.89 + ? = 100
  12. 12.8 + ? = 10
  13. 13.88 + ? = 100
  14. 14.27 + ? = 100
  15. 15.7 + ? = 10
  16. 16.1 + ? = 10
  17. 17.54 + ? = 100
  18. 18.6 + ? = 10
  19. 19.9 + ? = 10
  20. 20.2 + ? = 10
  21. 21.38 + ? = 100
  22. 22.69 + ? = 100
  23. 23.74 + ? = 100
  24. 24.44 + ? = 100
  25. 25.85 + ? = 100
  26. 26.73 + ? = 100
  27. 27.76 + ? = 100
  28. 28.63 + ? = 100
  29. 29.87 + ? = 100
  30. 30.52 + ? = 100
  31. 31.49 + ? = 100
  32. 32.32 + ? = 100
  33. 33.43 + ? = 100
  34. 34.19 + ? = 100
  35. 35.65 + ? = 100
  36. 36.33 + ? = 100
  37. 37.17 + ? = 100
  38. 38.50 + ? = 100
  39. 39.78 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 7
  2. 89
  3. 66
  4. 72
  5. 19
  6. 40
  7. 63
  8. 36
  9. 6
  10. 5
  11. 11
  12. 2
  13. 12
  14. 73
  15. 3
  16. 9
  17. 46
  18. 4
  19. 1
  20. 8
  21. 62
  22. 31
  23. 26
  24. 56
  25. 15
  26. 27
  27. 24
  28. 37
  29. 13
  30. 48
  31. 51
  32. 68
  33. 57
  34. 81
  35. 35
  36. 67
  37. 83
  38. 50
  39. 22
  40. 32

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