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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 360 · 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. 1.36 × 35 =
  2. 2.75 × 38 =
  3. 3.22 × 35 =
  4. 4.28 × 25 =
  5. 5.34 × 15 =
  6. 6.40 × 35 =
  7. 7.14 × 25 =
  8. 8.55 × 6 =
  9. 9.32 × 15 =
  10. 10.20 × 65 =
  11. 11.26 × 25 =
  12. 12.35 × 32 =
  13. 13.75 × 8 =
  14. 14.45 × 16 =
  15. 15.15 × 16 =
  16. 16.38 × 125 =
  17. 17.32 × 25 =
  18. 18.12 × 25 =
  19. 19.15 × 38 =
  20. 20.75 × 8 =
  21. 21.16 × 65 =
  22. 22.35 × 36 =
  23. 23.16 × 125 =
  24. 24.65 × 26 =
  25. 25.20 × 45 =
  26. 26.8 × 55 =
  27. 27.34 × 25 =
  28. 28.24 × 25 =
  29. 29.20 × 35 =
  30. 30.8 × 25 =
  31. 31.15 × 26 =
  32. 32.25 × 22 =
  33. 33.34 × 45 =
  34. 34.22 × 45 =
  35. 35.55 × 28 =
  36. 36.12 × 65 =
  37. 37.24 × 45 =
  38. 38.75 × 24 =
  39. 39.38 × 15 =
  40. 40.65 × 32 =

Answer key

  1. 1260
  2. 2850
  3. 770
  4. 700
  5. 510
  6. 1400
  7. 350
  8. 330
  9. 480
  10. 1300
  11. 650
  12. 1120
  13. 600
  14. 720
  15. 240
  16. 4750
  17. 800
  18. 300
  19. 570
  20. 600
  21. 1040
  22. 1260
  23. 2000
  24. 1690
  25. 900
  26. 440
  27. 850
  28. 600
  29. 700
  30. 200
  31. 390
  32. 550
  33. 1530
  34. 990
  35. 1540
  36. 780
  37. 1080
  38. 1800
  39. 570
  40. 2080

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