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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 644 · 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. 1.35 × 12 =
  2. 2.35 × 28 =
  3. 3.125 × 38 =
  4. 4.12 × 55 =
  5. 5.28 × 125 =
  6. 6.75 × 8 =
  7. 7.65 × 28 =
  8. 8.36 × 65 =
  9. 9.45 × 10 =
  10. 10.65 × 24 =
  11. 11.65 × 8 =
  12. 12.45 × 22 =
  13. 13.36 × 75 =
  14. 14.35 × 6 =
  15. 15.25 × 26 =
  16. 16.55 × 28 =
  17. 17.30 × 75 =
  18. 18.18 × 75 =
  19. 19.12 × 75 =
  20. 20.15 × 22 =
  21. 21.75 × 24 =
  22. 22.34 × 15 =
  23. 23.22 × 75 =
  24. 24.15 × 8 =
  25. 25.15 × 28 =
  26. 26.65 × 28 =
  27. 27.75 × 36 =
  28. 28.15 × 28 =
  29. 29.12 × 15 =
  30. 30.26 × 55 =
  31. 31.25 × 36 =
  32. 32.32 × 125 =
  33. 33.65 × 22 =
  34. 34.24 × 15 =
  35. 35.35 × 24 =
  36. 36.34 × 125 =
  37. 37.18 × 45 =
  38. 38.32 × 15 =
  39. 39.125 × 34 =
  40. 40.6 × 65 =

Answer key

  1. 420
  2. 980
  3. 4750
  4. 660
  5. 3500
  6. 600
  7. 1820
  8. 2340
  9. 450
  10. 1560
  11. 520
  12. 990
  13. 2700
  14. 210
  15. 650
  16. 1540
  17. 2250
  18. 1350
  19. 900
  20. 330
  21. 1800
  22. 510
  23. 1650
  24. 120
  25. 420
  26. 1820
  27. 2700
  28. 420
  29. 180
  30. 1430
  31. 900
  32. 4000
  33. 1430
  34. 360
  35. 840
  36. 4250
  37. 810
  38. 480
  39. 4250
  40. 390

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