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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 79 · 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. 1.18 × 25 =
  2. 2.22 × 35 =
  3. 3.28 × 45 =
  4. 4.38 × 55 =
  5. 5.45 × 18 =
  6. 6.55 × 32 =
  7. 7.55 × 18 =
  8. 8.15 × 14 =
  9. 9.22 × 65 =
  10. 10.36 × 65 =
  11. 11.32 × 45 =
  12. 12.28 × 25 =
  13. 13.55 × 28 =
  14. 14.45 × 18 =
  15. 15.18 × 75 =
  16. 16.15 × 38 =
  17. 17.125 × 16 =
  18. 18.38 × 35 =
  19. 19.55 × 14 =
  20. 20.16 × 15 =
  21. 21.12 × 15 =
  22. 22.40 × 125 =
  23. 23.12 × 55 =
  24. 24.65 × 28 =
  25. 25.65 × 6 =
  26. 26.55 × 6 =
  27. 27.26 × 75 =
  28. 28.65 × 26 =
  29. 29.18 × 15 =
  30. 30.28 × 75 =
  31. 31.45 × 38 =
  32. 32.35 × 12 =
  33. 33.45 × 6 =
  34. 34.36 × 125 =
  35. 35.25 × 22 =
  36. 36.45 × 36 =
  37. 37.55 × 6 =
  38. 38.14 × 35 =
  39. 39.65 × 16 =
  40. 40.14 × 55 =

Answer key

  1. 450
  2. 770
  3. 1260
  4. 2090
  5. 810
  6. 1760
  7. 990
  8. 210
  9. 1430
  10. 2340
  11. 1440
  12. 700
  13. 1540
  14. 810
  15. 1350
  16. 570
  17. 2000
  18. 1330
  19. 770
  20. 240
  21. 180
  22. 5000
  23. 660
  24. 1820
  25. 390
  26. 330
  27. 1950
  28. 1690
  29. 270
  30. 2100
  31. 1710
  32. 420
  33. 270
  34. 4500
  35. 550
  36. 1620
  37. 330
  38. 490
  39. 1040
  40. 770

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