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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 343 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.2 + ? = 10
  4. 4.60 + ? = 100
  5. 5.8 + ? = 10
  6. 6.51 + ? = 100
  7. 7.80 + ? = 100
  8. 8.6 + ? = 10
  9. 9.1 + ? = 10
  10. 10.21 + ? = 100
  11. 11.68 + ? = 100
  12. 12.37 + ? = 100
  13. 13.54 + ? = 100
  14. 14.88 + ? = 100
  15. 15.85 + ? = 100
  16. 16.57 + ? = 100
  17. 17.24 + ? = 100
  18. 18.34 + ? = 100
  19. 19.15 + ? = 100
  20. 20.70 + ? = 100
  21. 21.46 + ? = 100
  22. 22.5 + ? = 10
  23. 23.32 + ? = 100
  24. 24.38 + ? = 100
  25. 25.65 + ? = 100
  26. 26.33 + ? = 100
  27. 27.67 + ? = 100
  28. 28.11 + ? = 100
  29. 29.27 + ? = 100
  30. 30.84 + ? = 100
  31. 31.30 + ? = 100
  32. 32.78 + ? = 100
  33. 33.75 + ? = 100
  34. 34.19 + ? = 100
  35. 35.44 + ? = 100
  36. 36.14 + ? = 100
  37. 37.17 + ? = 100
  38. 38.81 + ? = 100
  39. 39.50 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 3
  2. 1
  3. 8
  4. 40
  5. 2
  6. 49
  7. 20
  8. 4
  9. 9
  10. 79
  11. 32
  12. 63
  13. 46
  14. 12
  15. 15
  16. 43
  17. 76
  18. 66
  19. 85
  20. 30
  21. 54
  22. 5
  23. 68
  24. 62
  25. 35
  26. 67
  27. 33
  28. 89
  29. 73
  30. 16
  31. 70
  32. 22
  33. 25
  34. 81
  35. 56
  36. 86
  37. 83
  38. 19
  39. 50
  40. 60

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