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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 702 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.15 × 40 =
  2. 2.65 × 32 =
  3. 3.26 × 75 =
  4. 4.26 × 75 =
  5. 5.14 × 45 =
  6. 6.35 × 10 =
  7. 7.15 × 28 =
  8. 8.22 × 45 =
  9. 9.35 × 10 =
  10. 10.40 × 75 =
  11. 11.125 × 40 =
  12. 12.12 × 15 =
  13. 13.65 × 36 =
  14. 14.40 × 35 =
  15. 15.75 × 24 =
  16. 16.65 × 8 =
  17. 17.35 × 32 =
  18. 18.15 × 8 =
  19. 19.25 × 10 =
  20. 20.6 × 35 =
  21. 21.25 × 32 =
  22. 22.12 × 25 =
  23. 23.35 × 20 =
  24. 24.16 × 35 =
  25. 25.18 × 25 =
  26. 26.65 × 30 =
  27. 27.22 × 15 =
  28. 28.26 × 25 =
  29. 29.55 × 12 =
  30. 30.35 × 22 =
  31. 31.15 × 30 =
  32. 32.40 × 55 =
  33. 33.6 × 35 =
  34. 34.15 × 28 =
  35. 35.55 × 24 =
  36. 36.10 × 65 =
  37. 37.45 × 8 =
  38. 38.35 × 18 =
  39. 39.10 × 25 =
  40. 40.6 × 35 =

Answer key

  1. 600
  2. 2080
  3. 1950
  4. 1950
  5. 630
  6. 350
  7. 420
  8. 990
  9. 350
  10. 3000
  11. 5000
  12. 180
  13. 2340
  14. 1400
  15. 1800
  16. 520
  17. 1120
  18. 120
  19. 250
  20. 210
  21. 800
  22. 300
  23. 700
  24. 560
  25. 450
  26. 1950
  27. 330
  28. 650
  29. 660
  30. 770
  31. 450
  32. 2200
  33. 210
  34. 420
  35. 1320
  36. 650
  37. 360
  38. 630
  39. 250
  40. 210

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