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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 797 · 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. 1.49 + ? = 100
  2. 2.1 + ? = 10
  3. 3.3 + ? = 10
  4. 4.29 + ? = 100
  5. 5.22 + ? = 100
  6. 6.21 + ? = 100
  7. 7.4 + ? = 10
  8. 8.2 + ? = 10
  9. 9.50 + ? = 100
  10. 10.9 + ? = 10
  11. 11.33 + ? = 100
  12. 12.7 + ? = 10
  13. 13.5 + ? = 10
  14. 14.6 + ? = 10
  15. 15.55 + ? = 100
  16. 16.74 + ? = 100
  17. 17.32 + ? = 100
  18. 18.53 + ? = 100
  19. 19.12 + ? = 100
  20. 20.8 + ? = 10
  21. 21.24 + ? = 100
  22. 22.61 + ? = 100
  23. 23.72 + ? = 100
  24. 24.79 + ? = 100
  25. 25.60 + ? = 100
  26. 26.27 + ? = 100
  27. 27.15 + ? = 100
  28. 28.88 + ? = 100
  29. 29.20 + ? = 100
  30. 30.26 + ? = 100
  31. 31.30 + ? = 100
  32. 32.75 + ? = 100
  33. 33.34 + ? = 100
  34. 34.40 + ? = 100
  35. 35.85 + ? = 100
  36. 36.57 + ? = 100
  37. 37.73 + ? = 100
  38. 38.66 + ? = 100
  39. 39.52 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 51
  2. 9
  3. 7
  4. 71
  5. 78
  6. 79
  7. 6
  8. 8
  9. 50
  10. 1
  11. 67
  12. 3
  13. 5
  14. 4
  15. 45
  16. 26
  17. 68
  18. 47
  19. 88
  20. 2
  21. 76
  22. 39
  23. 28
  24. 21
  25. 40
  26. 73
  27. 85
  28. 12
  29. 80
  30. 74
  31. 70
  32. 25
  33. 66
  34. 60
  35. 15
  36. 43
  37. 27
  38. 34
  39. 48
  40. 59

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