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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 722 · 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. 1.6 + ? = 10
  2. 2.1 + ? = 10
  3. 3.4 + ? = 10
  4. 4.55 + ? = 100
  5. 5.9 + ? = 10
  6. 6.3 + ? = 10
  7. 7.8 + ? = 10
  8. 8.81 + ? = 100
  9. 9.30 + ? = 100
  10. 10.2 + ? = 10
  11. 11.85 + ? = 100
  12. 12.15 + ? = 100
  13. 13.49 + ? = 100
  14. 14.64 + ? = 100
  15. 15.5 + ? = 10
  16. 16.16 + ? = 100
  17. 17.78 + ? = 100
  18. 18.48 + ? = 100
  19. 19.67 + ? = 100
  20. 20.18 + ? = 100
  21. 21.42 + ? = 100
  22. 22.86 + ? = 100
  23. 23.74 + ? = 100
  24. 24.53 + ? = 100
  25. 25.87 + ? = 100
  26. 26.72 + ? = 100
  27. 27.75 + ? = 100
  28. 28.46 + ? = 100
  29. 29.76 + ? = 100
  30. 30.7 + ? = 10
  31. 31.13 + ? = 100
  32. 32.65 + ? = 100
  33. 33.82 + ? = 100
  34. 34.47 + ? = 100
  35. 35.52 + ? = 100
  36. 36.51 + ? = 100
  37. 37.17 + ? = 100
  38. 38.34 + ? = 100
  39. 39.57 + ? = 100
  40. 40.50 + ? = 100

Answer key

  1. 4
  2. 9
  3. 6
  4. 45
  5. 1
  6. 7
  7. 2
  8. 19
  9. 70
  10. 8
  11. 15
  12. 85
  13. 51
  14. 36
  15. 5
  16. 84
  17. 22
  18. 52
  19. 33
  20. 82
  21. 58
  22. 14
  23. 26
  24. 47
  25. 13
  26. 28
  27. 25
  28. 54
  29. 24
  30. 3
  31. 87
  32. 35
  33. 18
  34. 53
  35. 48
  36. 49
  37. 83
  38. 66
  39. 43
  40. 50

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