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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 287 · 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. 1.65 × 20 =
  2. 2.18 × 125 =
  3. 3.22 × 55 =
  4. 4.12 × 75 =
  5. 5.6 × 65 =
  6. 6.22 × 125 =
  7. 7.35 × 10 =
  8. 8.8 × 65 =
  9. 9.18 × 125 =
  10. 10.38 × 25 =
  11. 11.65 × 10 =
  12. 12.45 × 8 =
  13. 13.24 × 45 =
  14. 14.38 × 125 =
  15. 15.26 × 25 =
  16. 16.65 × 38 =
  17. 17.14 × 15 =
  18. 18.45 × 12 =
  19. 19.45 × 22 =
  20. 20.32 × 125 =
  21. 21.8 × 25 =
  22. 22.36 × 55 =
  23. 23.25 × 28 =
  24. 24.24 × 35 =
  25. 25.32 × 75 =
  26. 26.22 × 45 =
  27. 27.75 × 24 =
  28. 28.32 × 35 =
  29. 29.65 × 30 =
  30. 30.35 × 14 =
  31. 31.40 × 65 =
  32. 32.12 × 45 =
  33. 33.125 × 30 =
  34. 34.26 × 15 =
  35. 35.6 × 15 =
  36. 36.125 × 26 =
  37. 37.10 × 65 =
  38. 38.34 × 15 =
  39. 39.75 × 32 =
  40. 40.35 × 38 =

Answer key

  1. 1300
  2. 2250
  3. 1210
  4. 900
  5. 390
  6. 2750
  7. 350
  8. 520
  9. 2250
  10. 950
  11. 650
  12. 360
  13. 1080
  14. 4750
  15. 650
  16. 2470
  17. 210
  18. 540
  19. 990
  20. 4000
  21. 200
  22. 1980
  23. 700
  24. 840
  25. 2400
  26. 990
  27. 1800
  28. 1120
  29. 1950
  30. 490
  31. 2600
  32. 540
  33. 3750
  34. 390
  35. 90
  36. 3250
  37. 650
  38. 510
  39. 2400
  40. 1330

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