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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 835 · 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. 1.52 + ? = 100
  2. 2.3 + ? = 10
  3. 3.8 + ? = 10
  4. 4.4 + ? = 10
  5. 5.46 + ? = 100
  6. 6.1 + ? = 10
  7. 7.6 + ? = 10
  8. 8.5 + ? = 10
  9. 9.2 + ? = 10
  10. 10.41 + ? = 100
  11. 11.71 + ? = 100
  12. 12.7 + ? = 10
  13. 13.32 + ? = 100
  14. 14.63 + ? = 100
  15. 15.11 + ? = 100
  16. 16.74 + ? = 100
  17. 17.22 + ? = 100
  18. 18.15 + ? = 100
  19. 19.47 + ? = 100
  20. 20.66 + ? = 100
  21. 21.51 + ? = 100
  22. 22.67 + ? = 100
  23. 23.9 + ? = 10
  24. 24.54 + ? = 100
  25. 25.37 + ? = 100
  26. 26.34 + ? = 100
  27. 27.21 + ? = 100
  28. 28.38 + ? = 100
  29. 29.76 + ? = 100
  30. 30.56 + ? = 100
  31. 31.36 + ? = 100
  32. 32.73 + ? = 100
  33. 33.39 + ? = 100
  34. 34.50 + ? = 100
  35. 35.87 + ? = 100
  36. 36.83 + ? = 100
  37. 37.33 + ? = 100
  38. 38.35 + ? = 100
  39. 39.14 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 48
  2. 7
  3. 2
  4. 6
  5. 54
  6. 9
  7. 4
  8. 5
  9. 8
  10. 59
  11. 29
  12. 3
  13. 68
  14. 37
  15. 89
  16. 26
  17. 78
  18. 85
  19. 53
  20. 34
  21. 49
  22. 33
  23. 1
  24. 46
  25. 63
  26. 66
  27. 79
  28. 62
  29. 24
  30. 44
  31. 64
  32. 27
  33. 61
  34. 50
  35. 13
  36. 17
  37. 67
  38. 65
  39. 86
  40. 57

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