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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 384 · 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. 1.45 × 38 =
  2. 2.32 × 125 =
  3. 3.25 × 10 =
  4. 4.28 × 35 =
  5. 5.26 × 125 =
  6. 6.26 × 15 =
  7. 7.15 × 16 =
  8. 8.6 × 45 =
  9. 9.45 × 28 =
  10. 10.55 × 26 =
  11. 11.25 × 6 =
  12. 12.28 × 15 =
  13. 13.38 × 65 =
  14. 14.8 × 25 =
  15. 15.20 × 125 =
  16. 16.8 × 25 =
  17. 17.12 × 45 =
  18. 18.25 × 24 =
  19. 19.12 × 75 =
  20. 20.15 × 18 =
  21. 21.20 × 75 =
  22. 22.8 × 15 =
  23. 23.75 × 28 =
  24. 24.12 × 125 =
  25. 25.125 × 32 =
  26. 26.16 × 15 =
  27. 27.15 × 22 =
  28. 28.75 × 26 =
  29. 29.6 × 125 =
  30. 30.15 × 34 =
  31. 31.38 × 15 =
  32. 32.30 × 75 =
  33. 33.65 × 30 =
  34. 34.14 × 35 =
  35. 35.26 × 45 =
  36. 36.15 × 40 =
  37. 37.10 × 25 =
  38. 38.38 × 125 =
  39. 39.25 × 18 =
  40. 40.45 × 38 =

Answer key

  1. 1710
  2. 4000
  3. 250
  4. 980
  5. 3250
  6. 390
  7. 240
  8. 270
  9. 1260
  10. 1430
  11. 150
  12. 420
  13. 2470
  14. 200
  15. 2500
  16. 200
  17. 540
  18. 600
  19. 900
  20. 270
  21. 1500
  22. 120
  23. 2100
  24. 1500
  25. 4000
  26. 240
  27. 330
  28. 1950
  29. 750
  30. 510
  31. 570
  32. 2250
  33. 1950
  34. 490
  35. 1170
  36. 600
  37. 250
  38. 4750
  39. 450
  40. 1710

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