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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 88 · 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. 1.1 + ? = 10
  2. 2.5 + ? = 10
  3. 3.7 + ? = 10
  4. 4.40 + ? = 100
  5. 5.2 + ? = 10
  6. 6.47 + ? = 100
  7. 7.6 + ? = 10
  8. 8.74 + ? = 100
  9. 9.12 + ? = 100
  10. 10.39 + ? = 100
  11. 11.89 + ? = 100
  12. 12.78 + ? = 100
  13. 13.4 + ? = 10
  14. 14.8 + ? = 10
  15. 15.27 + ? = 100
  16. 16.18 + ? = 100
  17. 17.33 + ? = 100
  18. 18.43 + ? = 100
  19. 19.56 + ? = 100
  20. 20.29 + ? = 100
  21. 21.19 + ? = 100
  22. 22.23 + ? = 100
  23. 23.9 + ? = 10
  24. 24.80 + ? = 100
  25. 25.53 + ? = 100
  26. 26.3 + ? = 10
  27. 27.62 + ? = 100
  28. 28.14 + ? = 100
  29. 29.50 + ? = 100
  30. 30.52 + ? = 100
  31. 31.63 + ? = 100
  32. 32.88 + ? = 100
  33. 33.35 + ? = 100
  34. 34.87 + ? = 100
  35. 35.60 + ? = 100
  36. 36.20 + ? = 100
  37. 37.67 + ? = 100
  38. 38.55 + ? = 100
  39. 39.22 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 9
  2. 5
  3. 3
  4. 60
  5. 8
  6. 53
  7. 4
  8. 26
  9. 88
  10. 61
  11. 11
  12. 22
  13. 6
  14. 2
  15. 73
  16. 82
  17. 67
  18. 57
  19. 44
  20. 71
  21. 81
  22. 77
  23. 1
  24. 20
  25. 47
  26. 7
  27. 38
  28. 86
  29. 50
  30. 48
  31. 37
  32. 12
  33. 65
  34. 13
  35. 40
  36. 80
  37. 33
  38. 45
  39. 78
  40. 35

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