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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 614 · 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. 1.12 × 15 =
  2. 2.75 × 36 =
  3. 3.125 × 8 =
  4. 4.25 × 34 =
  5. 5.10 × 75 =
  6. 6.12 × 25 =
  7. 7.35 × 14 =
  8. 8.12 × 35 =
  9. 9.24 × 35 =
  10. 10.34 × 45 =
  11. 11.25 × 26 =
  12. 12.45 × 14 =
  13. 13.20 × 45 =
  14. 14.6 × 15 =
  15. 15.20 × 125 =
  16. 16.26 × 125 =
  17. 17.38 × 45 =
  18. 18.15 × 32 =
  19. 19.26 × 15 =
  20. 20.14 × 55 =
  21. 21.35 × 12 =
  22. 22.40 × 65 =
  23. 23.125 × 38 =
  24. 24.34 × 125 =
  25. 25.35 × 10 =
  26. 26.125 × 32 =
  27. 27.55 × 12 =
  28. 28.65 × 20 =
  29. 29.15 × 34 =
  30. 30.75 × 18 =
  31. 31.125 × 20 =
  32. 32.55 × 40 =
  33. 33.125 × 16 =
  34. 34.65 × 36 =
  35. 35.65 × 34 =
  36. 36.22 × 45 =
  37. 37.30 × 65 =
  38. 38.45 × 16 =
  39. 39.35 × 32 =
  40. 40.24 × 15 =

Answer key

  1. 180
  2. 2700
  3. 1000
  4. 850
  5. 750
  6. 300
  7. 490
  8. 420
  9. 840
  10. 1530
  11. 650
  12. 630
  13. 900
  14. 90
  15. 2500
  16. 3250
  17. 1710
  18. 480
  19. 390
  20. 770
  21. 420
  22. 2600
  23. 4750
  24. 4250
  25. 350
  26. 4000
  27. 660
  28. 1300
  29. 510
  30. 1350
  31. 2500
  32. 2200
  33. 2000
  34. 2340
  35. 2210
  36. 990
  37. 1950
  38. 720
  39. 1120
  40. 360

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