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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 825 · 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. 1.5 + ? = 10
  2. 2.3 + ? = 10
  3. 3.21 + ? = 100
  4. 4.53 + ? = 100
  5. 5.4 + ? = 10
  6. 6.7 + ? = 10
  7. 7.76 + ? = 100
  8. 8.88 + ? = 100
  9. 9.46 + ? = 100
  10. 10.77 + ? = 100
  11. 11.8 + ? = 10
  12. 12.14 + ? = 100
  13. 13.70 + ? = 100
  14. 14.85 + ? = 100
  15. 15.84 + ? = 100
  16. 16.6 + ? = 10
  17. 17.16 + ? = 100
  18. 18.49 + ? = 100
  19. 19.31 + ? = 100
  20. 20.1 + ? = 10
  21. 21.9 + ? = 10
  22. 22.2 + ? = 10
  23. 23.15 + ? = 100
  24. 24.33 + ? = 100
  25. 25.68 + ? = 100
  26. 26.63 + ? = 100
  27. 27.69 + ? = 100
  28. 28.22 + ? = 100
  29. 29.34 + ? = 100
  30. 30.32 + ? = 100
  31. 31.48 + ? = 100
  32. 32.62 + ? = 100
  33. 33.35 + ? = 100
  34. 34.27 + ? = 100
  35. 35.51 + ? = 100
  36. 36.50 + ? = 100
  37. 37.13 + ? = 100
  38. 38.42 + ? = 100
  39. 39.23 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 5
  2. 7
  3. 79
  4. 47
  5. 6
  6. 3
  7. 24
  8. 12
  9. 54
  10. 23
  11. 2
  12. 86
  13. 30
  14. 15
  15. 16
  16. 4
  17. 84
  18. 51
  19. 69
  20. 9
  21. 1
  22. 8
  23. 85
  24. 67
  25. 32
  26. 37
  27. 31
  28. 78
  29. 66
  30. 68
  31. 52
  32. 38
  33. 65
  34. 73
  35. 49
  36. 50
  37. 87
  38. 58
  39. 77
  40. 27

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