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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 759 · 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. 1.85 + ? = 100
  2. 2.62 + ? = 100
  3. 3.59 + ? = 100
  4. 4.77 + ? = 100
  5. 5.9 + ? = 10
  6. 6.83 + ? = 100
  7. 7.35 + ? = 100
  8. 8.1 + ? = 10
  9. 9.14 + ? = 100
  10. 10.4 + ? = 10
  11. 11.12 + ? = 100
  12. 12.7 + ? = 10
  13. 13.86 + ? = 100
  14. 14.5 + ? = 10
  15. 15.70 + ? = 100
  16. 16.63 + ? = 100
  17. 17.55 + ? = 100
  18. 18.6 + ? = 10
  19. 19.3 + ? = 10
  20. 20.66 + ? = 100
  21. 21.72 + ? = 100
  22. 22.88 + ? = 100
  23. 23.26 + ? = 100
  24. 24.40 + ? = 100
  25. 25.8 + ? = 10
  26. 26.2 + ? = 10
  27. 27.29 + ? = 100
  28. 28.50 + ? = 100
  29. 29.74 + ? = 100
  30. 30.64 + ? = 100
  31. 31.44 + ? = 100
  32. 32.38 + ? = 100
  33. 33.15 + ? = 100
  34. 34.75 + ? = 100
  35. 35.68 + ? = 100
  36. 36.37 + ? = 100
  37. 37.43 + ? = 100
  38. 38.69 + ? = 100
  39. 39.57 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 15
  2. 38
  3. 41
  4. 23
  5. 1
  6. 17
  7. 65
  8. 9
  9. 86
  10. 6
  11. 88
  12. 3
  13. 14
  14. 5
  15. 30
  16. 37
  17. 45
  18. 4
  19. 7
  20. 34
  21. 28
  22. 12
  23. 74
  24. 60
  25. 2
  26. 8
  27. 71
  28. 50
  29. 26
  30. 36
  31. 56
  32. 62
  33. 85
  34. 25
  35. 32
  36. 63
  37. 57
  38. 31
  39. 43
  40. 27

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