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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 688 · 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. 2.12 + ? = 100
  3. 3.25 + ? = 100
  4. 4.64 + ? = 100
  5. 5.9 + ? = 10
  6. 6.48 + ? = 100
  7. 7.5 + ? = 10
  8. 8.4 + ? = 10
  9. 9.3 + ? = 10
  10. 10.52 + ? = 100
  11. 11.2 + ? = 10
  12. 12.55 + ? = 100
  13. 13.1 + ? = 10
  14. 14.57 + ? = 100
  15. 15.7 + ? = 10
  16. 16.59 + ? = 100
  17. 17.13 + ? = 100
  18. 18.11 + ? = 100
  19. 19.73 + ? = 100
  20. 20.26 + ? = 100
  21. 21.86 + ? = 100
  22. 22.20 + ? = 100
  23. 23.43 + ? = 100
  24. 24.42 + ? = 100
  25. 25.37 + ? = 100
  26. 26.40 + ? = 100
  27. 27.22 + ? = 100
  28. 28.23 + ? = 100
  29. 29.65 + ? = 100
  30. 30.6 + ? = 10
  31. 31.34 + ? = 100
  32. 32.27 + ? = 100
  33. 33.80 + ? = 100
  34. 34.44 + ? = 100
  35. 35.45 + ? = 100
  36. 36.88 + ? = 100
  37. 37.51 + ? = 100
  38. 38.47 + ? = 100
  39. 39.58 + ? = 100
  40. 40.36 + ? = 100

Answer key

  1. 2
  2. 88
  3. 75
  4. 36
  5. 1
  6. 52
  7. 5
  8. 6
  9. 7
  10. 48
  11. 8
  12. 45
  13. 9
  14. 43
  15. 3
  16. 41
  17. 87
  18. 89
  19. 27
  20. 74
  21. 14
  22. 80
  23. 57
  24. 58
  25. 63
  26. 60
  27. 78
  28. 77
  29. 35
  30. 4
  31. 66
  32. 73
  33. 20
  34. 56
  35. 55
  36. 12
  37. 49
  38. 53
  39. 42
  40. 64

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