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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 906 · 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. 1.12 + ? = 100
  2. 2.1 + ? = 10
  3. 3.73 + ? = 100
  4. 4.7 + ? = 10
  5. 5.31 + ? = 100
  6. 6.80 + ? = 100
  7. 7.6 + ? = 10
  8. 8.2 + ? = 10
  9. 9.47 + ? = 100
  10. 10.4 + ? = 10
  11. 11.3 + ? = 10
  12. 12.67 + ? = 100
  13. 13.76 + ? = 100
  14. 14.85 + ? = 100
  15. 15.11 + ? = 100
  16. 16.65 + ? = 100
  17. 17.9 + ? = 10
  18. 18.45 + ? = 100
  19. 19.87 + ? = 100
  20. 20.62 + ? = 100
  21. 21.20 + ? = 100
  22. 22.23 + ? = 100
  23. 23.53 + ? = 100
  24. 24.88 + ? = 100
  25. 25.74 + ? = 100
  26. 26.78 + ? = 100
  27. 27.63 + ? = 100
  28. 28.26 + ? = 100
  29. 29.18 + ? = 100
  30. 30.36 + ? = 100
  31. 31.55 + ? = 100
  32. 32.40 + ? = 100
  33. 33.33 + ? = 100
  34. 34.16 + ? = 100
  35. 35.34 + ? = 100
  36. 36.29 + ? = 100
  37. 37.42 + ? = 100
  38. 38.46 + ? = 100
  39. 39.32 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 88
  2. 9
  3. 27
  4. 3
  5. 69
  6. 20
  7. 4
  8. 8
  9. 53
  10. 6
  11. 7
  12. 33
  13. 24
  14. 15
  15. 89
  16. 35
  17. 1
  18. 55
  19. 13
  20. 38
  21. 80
  22. 77
  23. 47
  24. 12
  25. 26
  26. 22
  27. 37
  28. 74
  29. 82
  30. 64
  31. 45
  32. 60
  33. 67
  34. 84
  35. 66
  36. 71
  37. 58
  38. 54
  39. 68
  40. 85

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