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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 230 · 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. 1.125 × 26 =
  2. 2.25 × 22 =
  3. 3.15 × 40 =
  4. 4.40 × 75 =
  5. 5.75 × 24 =
  6. 6.125 × 20 =
  7. 7.25 × 28 =
  8. 8.15 × 34 =
  9. 9.12 × 55 =
  10. 10.15 × 36 =
  11. 11.38 × 65 =
  12. 12.45 × 38 =
  13. 13.30 × 125 =
  14. 14.35 × 30 =
  15. 15.35 × 40 =
  16. 16.18 × 45 =
  17. 17.16 × 15 =
  18. 18.15 × 34 =
  19. 19.65 × 38 =
  20. 20.35 × 16 =
  21. 21.25 × 8 =
  22. 22.24 × 15 =
  23. 23.75 × 6 =
  24. 24.15 × 36 =
  25. 25.15 × 30 =
  26. 26.6 × 45 =
  27. 27.12 × 65 =
  28. 28.125 × 6 =
  29. 29.75 × 34 =
  30. 30.125 × 20 =
  31. 31.65 × 10 =
  32. 32.65 × 40 =
  33. 33.6 × 65 =
  34. 34.8 × 25 =
  35. 35.35 × 6 =
  36. 36.10 × 65 =
  37. 37.125 × 16 =
  38. 38.15 × 26 =
  39. 39.15 × 40 =
  40. 40.45 × 14 =

Answer key

  1. 3250
  2. 550
  3. 600
  4. 3000
  5. 1800
  6. 2500
  7. 700
  8. 510
  9. 660
  10. 540
  11. 2470
  12. 1710
  13. 3750
  14. 1050
  15. 1400
  16. 810
  17. 240
  18. 510
  19. 2470
  20. 560
  21. 200
  22. 360
  23. 450
  24. 540
  25. 450
  26. 270
  27. 780
  28. 750
  29. 2550
  30. 2500
  31. 650
  32. 2600
  33. 390
  34. 200
  35. 210
  36. 650
  37. 2000
  38. 390
  39. 600
  40. 630

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