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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 402 · 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. 1.10 × 35 =
  2. 2.45 × 32 =
  3. 3.38 × 55 =
  4. 4.55 × 12 =
  5. 5.35 × 26 =
  6. 6.22 × 25 =
  7. 7.45 × 20 =
  8. 8.20 × 125 =
  9. 9.125 × 26 =
  10. 10.14 × 45 =
  11. 11.15 × 16 =
  12. 12.18 × 15 =
  13. 13.75 × 36 =
  14. 14.45 × 12 =
  15. 15.35 × 12 =
  16. 16.55 × 8 =
  17. 17.55 × 38 =
  18. 18.34 × 45 =
  19. 19.65 × 14 =
  20. 20.125 × 28 =
  21. 21.8 × 55 =
  22. 22.18 × 35 =
  23. 23.45 × 22 =
  24. 24.65 × 6 =
  25. 25.15 × 38 =
  26. 26.125 × 6 =
  27. 27.22 × 15 =
  28. 28.125 × 6 =
  29. 29.25 × 12 =
  30. 30.36 × 75 =
  31. 31.45 × 18 =
  32. 32.32 × 35 =
  33. 33.22 × 25 =
  34. 34.10 × 45 =
  35. 35.65 × 8 =
  36. 36.125 × 24 =
  37. 37.125 × 30 =
  38. 38.12 × 15 =
  39. 39.15 × 8 =
  40. 40.8 × 75 =

Answer key

  1. 350
  2. 1440
  3. 2090
  4. 660
  5. 910
  6. 550
  7. 900
  8. 2500
  9. 3250
  10. 630
  11. 240
  12. 270
  13. 2700
  14. 540
  15. 420
  16. 440
  17. 2090
  18. 1530
  19. 910
  20. 3500
  21. 440
  22. 630
  23. 990
  24. 390
  25. 570
  26. 750
  27. 330
  28. 750
  29. 300
  30. 2700
  31. 810
  32. 1120
  33. 550
  34. 450
  35. 520
  36. 3000
  37. 3750
  38. 180
  39. 120
  40. 600

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