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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 428 · 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. 1.26 × 75 =
  2. 2.10 × 125 =
  3. 3.55 × 18 =
  4. 4.28 × 15 =
  5. 5.36 × 125 =
  6. 6.36 × 15 =
  7. 7.14 × 125 =
  8. 8.8 × 65 =
  9. 9.10 × 15 =
  10. 10.125 × 14 =
  11. 11.24 × 55 =
  12. 12.15 × 16 =
  13. 13.20 × 15 =
  14. 14.8 × 25 =
  15. 15.75 × 22 =
  16. 16.12 × 15 =
  17. 17.22 × 75 =
  18. 18.32 × 75 =
  19. 19.20 × 25 =
  20. 20.30 × 75 =
  21. 21.55 × 18 =
  22. 22.65 × 18 =
  23. 23.45 × 30 =
  24. 24.15 × 24 =
  25. 25.15 × 34 =
  26. 26.15 × 6 =
  27. 27.12 × 45 =
  28. 28.125 × 12 =
  29. 29.26 × 65 =
  30. 30.20 × 125 =
  31. 31.45 × 10 =
  32. 32.45 × 8 =
  33. 33.38 × 45 =
  34. 34.125 × 12 =
  35. 35.65 × 40 =
  36. 36.35 × 28 =
  37. 37.55 × 6 =
  38. 38.14 × 35 =
  39. 39.35 × 16 =
  40. 40.32 × 75 =

Answer key

  1. 1950
  2. 1250
  3. 990
  4. 420
  5. 4500
  6. 540
  7. 1750
  8. 520
  9. 150
  10. 1750
  11. 1320
  12. 240
  13. 300
  14. 200
  15. 1650
  16. 180
  17. 1650
  18. 2400
  19. 500
  20. 2250
  21. 990
  22. 1170
  23. 1350
  24. 360
  25. 510
  26. 90
  27. 540
  28. 1500
  29. 1690
  30. 2500
  31. 450
  32. 360
  33. 1710
  34. 1500
  35. 2600
  36. 980
  37. 330
  38. 490
  39. 560
  40. 2400

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