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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 361 · 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. 1.8 + ? = 10
  2. 2.25 + ? = 100
  3. 3.46 + ? = 100
  4. 4.5 + ? = 10
  5. 5.33 + ? = 100
  6. 6.2 + ? = 10
  7. 7.1 + ? = 10
  8. 8.16 + ? = 100
  9. 9.4 + ? = 10
  10. 10.45 + ? = 100
  11. 11.12 + ? = 100
  12. 12.9 + ? = 10
  13. 13.87 + ? = 100
  14. 14.88 + ? = 100
  15. 15.32 + ? = 100
  16. 16.44 + ? = 100
  17. 17.6 + ? = 10
  18. 18.76 + ? = 100
  19. 19.29 + ? = 100
  20. 20.7 + ? = 10
  21. 21.66 + ? = 100
  22. 22.3 + ? = 10
  23. 23.55 + ? = 100
  24. 24.48 + ? = 100
  25. 25.23 + ? = 100
  26. 26.74 + ? = 100
  27. 27.63 + ? = 100
  28. 28.60 + ? = 100
  29. 29.47 + ? = 100
  30. 30.27 + ? = 100
  31. 31.37 + ? = 100
  32. 32.75 + ? = 100
  33. 33.69 + ? = 100
  34. 34.81 + ? = 100
  35. 35.71 + ? = 100
  36. 36.57 + ? = 100
  37. 37.78 + ? = 100
  38. 38.84 + ? = 100
  39. 39.79 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 2
  2. 75
  3. 54
  4. 5
  5. 67
  6. 8
  7. 9
  8. 84
  9. 6
  10. 55
  11. 88
  12. 1
  13. 13
  14. 12
  15. 68
  16. 56
  17. 4
  18. 24
  19. 71
  20. 3
  21. 34
  22. 7
  23. 45
  24. 52
  25. 77
  26. 26
  27. 37
  28. 40
  29. 53
  30. 73
  31. 63
  32. 25
  33. 31
  34. 19
  35. 29
  36. 43
  37. 22
  38. 16
  39. 21
  40. 58

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