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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 701 · 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. 1.12 × 35 =
  2. 2.32 × 35 =
  3. 3.45 × 34 =
  4. 4.25 × 40 =
  5. 5.75 × 34 =
  6. 6.25 × 12 =
  7. 7.35 × 30 =
  8. 8.10 × 55 =
  9. 9.125 × 10 =
  10. 10.45 × 20 =
  11. 11.36 × 45 =
  12. 12.75 × 28 =
  13. 13.20 × 25 =
  14. 14.45 × 6 =
  15. 15.45 × 18 =
  16. 16.15 × 34 =
  17. 17.30 × 75 =
  18. 18.35 × 20 =
  19. 19.18 × 15 =
  20. 20.15 × 18 =
  21. 21.35 × 22 =
  22. 22.14 × 45 =
  23. 23.55 × 30 =
  24. 24.65 × 40 =
  25. 25.25 × 20 =
  26. 26.55 × 24 =
  27. 27.24 × 125 =
  28. 28.18 × 25 =
  29. 29.15 × 34 =
  30. 30.30 × 45 =
  31. 31.15 × 38 =
  32. 32.65 × 12 =
  33. 33.55 × 18 =
  34. 34.45 × 12 =
  35. 35.35 × 38 =
  36. 36.45 × 6 =
  37. 37.25 × 38 =
  38. 38.16 × 75 =
  39. 39.12 × 75 =
  40. 40.75 × 20 =

Answer key

  1. 420
  2. 1120
  3. 1530
  4. 1000
  5. 2550
  6. 300
  7. 1050
  8. 550
  9. 1250
  10. 900
  11. 1620
  12. 2100
  13. 500
  14. 270
  15. 810
  16. 510
  17. 2250
  18. 700
  19. 270
  20. 270
  21. 770
  22. 630
  23. 1650
  24. 2600
  25. 500
  26. 1320
  27. 3000
  28. 450
  29. 510
  30. 1350
  31. 570
  32. 780
  33. 990
  34. 540
  35. 1330
  36. 270
  37. 950
  38. 1200
  39. 900
  40. 1500

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