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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 583 · 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. 3.34 + ? = 100
  4. 4.9 + ? = 10
  5. 5.5 + ? = 10
  6. 6.4 + ? = 10
  7. 7.64 + ? = 100
  8. 8.66 + ? = 100
  9. 9.48 + ? = 100
  10. 10.6 + ? = 10
  11. 11.19 + ? = 100
  12. 12.76 + ? = 100
  13. 13.57 + ? = 100
  14. 14.37 + ? = 100
  15. 15.23 + ? = 100
  16. 16.88 + ? = 100
  17. 17.68 + ? = 100
  18. 18.25 + ? = 100
  19. 19.7 + ? = 10
  20. 20.28 + ? = 100
  21. 21.8 + ? = 10
  22. 22.56 + ? = 100
  23. 23.67 + ? = 100
  24. 24.81 + ? = 100
  25. 25.1 + ? = 10
  26. 26.2 + ? = 10
  27. 27.69 + ? = 100
  28. 28.32 + ? = 100
  29. 29.35 + ? = 100
  30. 30.30 + ? = 100
  31. 31.74 + ? = 100
  32. 32.49 + ? = 100
  33. 33.27 + ? = 100
  34. 34.21 + ? = 100
  35. 35.59 + ? = 100
  36. 36.61 + ? = 100
  37. 37.62 + ? = 100
  38. 38.42 + ? = 100
  39. 39.71 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 7
  2. 85
  3. 66
  4. 1
  5. 5
  6. 6
  7. 36
  8. 34
  9. 52
  10. 4
  11. 81
  12. 24
  13. 43
  14. 63
  15. 77
  16. 12
  17. 32
  18. 75
  19. 3
  20. 72
  21. 2
  22. 44
  23. 33
  24. 19
  25. 9
  26. 8
  27. 31
  28. 68
  29. 65
  30. 70
  31. 26
  32. 51
  33. 73
  34. 79
  35. 41
  36. 39
  37. 38
  38. 58
  39. 29
  40. 15

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