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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 777 · 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. 1.1 + ? = 10
  2. 2.6 + ? = 10
  3. 3.3 + ? = 10
  4. 4.84 + ? = 100
  5. 5.64 + ? = 100
  6. 6.2 + ? = 10
  7. 7.82 + ? = 100
  8. 8.5 + ? = 10
  9. 9.38 + ? = 100
  10. 10.56 + ? = 100
  11. 11.74 + ? = 100
  12. 12.63 + ? = 100
  13. 13.8 + ? = 10
  14. 14.75 + ? = 100
  15. 15.4 + ? = 10
  16. 16.30 + ? = 100
  17. 17.48 + ? = 100
  18. 18.79 + ? = 100
  19. 19.9 + ? = 10
  20. 20.17 + ? = 100
  21. 21.25 + ? = 100
  22. 22.45 + ? = 100
  23. 23.46 + ? = 100
  24. 24.23 + ? = 100
  25. 25.88 + ? = 100
  26. 26.12 + ? = 100
  27. 27.7 + ? = 10
  28. 28.14 + ? = 100
  29. 29.35 + ? = 100
  30. 30.44 + ? = 100
  31. 31.61 + ? = 100
  32. 32.59 + ? = 100
  33. 33.55 + ? = 100
  34. 34.43 + ? = 100
  35. 35.76 + ? = 100
  36. 36.33 + ? = 100
  37. 37.85 + ? = 100
  38. 38.58 + ? = 100
  39. 39.18 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 9
  2. 4
  3. 7
  4. 16
  5. 36
  6. 8
  7. 18
  8. 5
  9. 62
  10. 44
  11. 26
  12. 37
  13. 2
  14. 25
  15. 6
  16. 70
  17. 52
  18. 21
  19. 1
  20. 83
  21. 75
  22. 55
  23. 54
  24. 77
  25. 12
  26. 88
  27. 3
  28. 86
  29. 65
  30. 56
  31. 39
  32. 41
  33. 45
  34. 57
  35. 24
  36. 67
  37. 15
  38. 42
  39. 82
  40. 35

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