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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 819 · 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. 1.84 + ? = 100
  2. 2.45 + ? = 100
  3. 3.1 + ? = 10
  4. 4.4 + ? = 10
  5. 5.20 + ? = 100
  6. 6.41 + ? = 100
  7. 7.81 + ? = 100
  8. 8.3 + ? = 10
  9. 9.8 + ? = 10
  10. 10.30 + ? = 100
  11. 11.75 + ? = 100
  12. 12.37 + ? = 100
  13. 13.73 + ? = 100
  14. 14.56 + ? = 100
  15. 15.26 + ? = 100
  16. 16.72 + ? = 100
  17. 17.27 + ? = 100
  18. 18.7 + ? = 10
  19. 19.88 + ? = 100
  20. 20.9 + ? = 10
  21. 21.42 + ? = 100
  22. 22.6 + ? = 10
  23. 23.5 + ? = 10
  24. 24.16 + ? = 100
  25. 25.76 + ? = 100
  26. 26.82 + ? = 100
  27. 27.54 + ? = 100
  28. 28.46 + ? = 100
  29. 29.19 + ? = 100
  30. 30.34 + ? = 100
  31. 31.15 + ? = 100
  32. 32.63 + ? = 100
  33. 33.61 + ? = 100
  34. 34.48 + ? = 100
  35. 35.28 + ? = 100
  36. 36.21 + ? = 100
  37. 37.51 + ? = 100
  38. 38.13 + ? = 100
  39. 39.2 + ? = 10
  40. 40.33 + ? = 100

Answer key

  1. 16
  2. 55
  3. 9
  4. 6
  5. 80
  6. 59
  7. 19
  8. 7
  9. 2
  10. 70
  11. 25
  12. 63
  13. 27
  14. 44
  15. 74
  16. 28
  17. 73
  18. 3
  19. 12
  20. 1
  21. 58
  22. 4
  23. 5
  24. 84
  25. 24
  26. 18
  27. 46
  28. 54
  29. 81
  30. 66
  31. 85
  32. 37
  33. 39
  34. 52
  35. 72
  36. 79
  37. 49
  38. 87
  39. 8
  40. 67

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