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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 802 · 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. 1.14 × 35 =
  2. 2.36 × 15 =
  3. 3.65 × 24 =
  4. 4.25 × 14 =
  5. 5.16 × 35 =
  6. 6.65 × 26 =
  7. 7.10 × 55 =
  8. 8.34 × 75 =
  9. 9.45 × 34 =
  10. 10.6 × 25 =
  11. 11.75 × 12 =
  12. 12.18 × 25 =
  13. 13.8 × 65 =
  14. 14.34 × 125 =
  15. 15.45 × 14 =
  16. 16.6 × 25 =
  17. 17.32 × 25 =
  18. 18.125 × 26 =
  19. 19.18 × 35 =
  20. 20.8 × 15 =
  21. 21.35 × 26 =
  22. 22.12 × 25 =
  23. 23.65 × 12 =
  24. 24.10 × 45 =
  25. 25.45 × 12 =
  26. 26.65 × 40 =
  27. 27.35 × 20 =
  28. 28.75 × 14 =
  29. 29.45 × 18 =
  30. 30.24 × 55 =
  31. 31.22 × 35 =
  32. 32.45 × 22 =
  33. 33.125 × 40 =
  34. 34.75 × 38 =
  35. 35.22 × 35 =
  36. 36.25 × 14 =
  37. 37.45 × 8 =
  38. 38.15 × 40 =
  39. 39.65 × 20 =
  40. 40.25 × 16 =

Answer key

  1. 490
  2. 540
  3. 1560
  4. 350
  5. 560
  6. 1690
  7. 550
  8. 2550
  9. 1530
  10. 150
  11. 900
  12. 450
  13. 520
  14. 4250
  15. 630
  16. 150
  17. 800
  18. 3250
  19. 630
  20. 120
  21. 910
  22. 300
  23. 780
  24. 450
  25. 540
  26. 2600
  27. 700
  28. 1050
  29. 810
  30. 1320
  31. 770
  32. 990
  33. 5000
  34. 2850
  35. 770
  36. 350
  37. 360
  38. 600
  39. 1300
  40. 400

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