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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 444 · 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. 1.30 × 75 =
  2. 2.35 × 20 =
  3. 3.15 × 14 =
  4. 4.75 × 28 =
  5. 5.32 × 15 =
  6. 6.8 × 125 =
  7. 7.8 × 55 =
  8. 8.45 × 12 =
  9. 9.6 × 15 =
  10. 10.75 × 26 =
  11. 11.65 × 36 =
  12. 12.32 × 25 =
  13. 13.55 × 10 =
  14. 14.55 × 8 =
  15. 15.45 × 10 =
  16. 16.45 × 16 =
  17. 17.55 × 18 =
  18. 18.26 × 125 =
  19. 19.125 × 22 =
  20. 20.30 × 125 =
  21. 21.22 × 15 =
  22. 22.75 × 20 =
  23. 23.55 × 38 =
  24. 24.18 × 75 =
  25. 25.75 × 6 =
  26. 26.16 × 35 =
  27. 27.40 × 15 =
  28. 28.14 × 25 =
  29. 29.25 × 26 =
  30. 30.8 × 15 =
  31. 31.18 × 55 =
  32. 32.35 × 8 =
  33. 33.8 × 55 =
  34. 34.65 × 6 =
  35. 35.12 × 35 =
  36. 36.28 × 125 =
  37. 37.125 × 10 =
  38. 38.45 × 32 =
  39. 39.15 × 32 =
  40. 40.22 × 15 =

Answer key

  1. 2250
  2. 700
  3. 210
  4. 2100
  5. 480
  6. 1000
  7. 440
  8. 540
  9. 90
  10. 1950
  11. 2340
  12. 800
  13. 550
  14. 440
  15. 450
  16. 720
  17. 990
  18. 3250
  19. 2750
  20. 3750
  21. 330
  22. 1500
  23. 2090
  24. 1350
  25. 450
  26. 560
  27. 600
  28. 350
  29. 650
  30. 120
  31. 990
  32. 280
  33. 440
  34. 390
  35. 420
  36. 3500
  37. 1250
  38. 1440
  39. 480
  40. 330

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