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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 946 · 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. 1.6 × 65 =
  2. 2.20 × 75 =
  3. 3.20 × 25 =
  4. 4.35 × 38 =
  5. 5.8 × 15 =
  6. 6.35 × 24 =
  7. 7.45 × 36 =
  8. 8.75 × 18 =
  9. 9.45 × 38 =
  10. 10.75 × 18 =
  11. 11.35 × 34 =
  12. 12.45 × 18 =
  13. 13.15 × 18 =
  14. 14.45 × 20 =
  15. 15.15 × 24 =
  16. 16.18 × 35 =
  17. 17.14 × 15 =
  18. 18.8 × 25 =
  19. 19.12 × 65 =
  20. 20.35 × 36 =
  21. 21.10 × 25 =
  22. 22.8 × 45 =
  23. 23.75 × 36 =
  24. 24.18 × 25 =
  25. 25.25 × 8 =
  26. 26.20 × 125 =
  27. 27.75 × 26 =
  28. 28.25 × 26 =
  29. 29.22 × 65 =
  30. 30.125 × 18 =
  31. 31.25 × 16 =
  32. 32.28 × 25 =
  33. 33.55 × 28 =
  34. 34.30 × 15 =
  35. 35.25 × 18 =
  36. 36.15 × 32 =
  37. 37.45 × 12 =
  38. 38.20 × 25 =
  39. 39.75 × 8 =
  40. 40.65 × 40 =

Answer key

  1. 390
  2. 1500
  3. 500
  4. 1330
  5. 120
  6. 840
  7. 1620
  8. 1350
  9. 1710
  10. 1350
  11. 1190
  12. 810
  13. 270
  14. 900
  15. 360
  16. 630
  17. 210
  18. 200
  19. 780
  20. 1260
  21. 250
  22. 360
  23. 2700
  24. 450
  25. 200
  26. 2500
  27. 1950
  28. 650
  29. 1430
  30. 2250
  31. 400
  32. 700
  33. 1540
  34. 450
  35. 450
  36. 480
  37. 540
  38. 500
  39. 600
  40. 2600

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