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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 638 · 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. 1.40 × 35 =
  2. 2.10 × 15 =
  3. 3.15 × 20 =
  4. 4.38 × 15 =
  5. 5.28 × 55 =
  6. 6.25 × 8 =
  7. 7.14 × 65 =
  8. 8.36 × 45 =
  9. 9.25 × 6 =
  10. 10.18 × 75 =
  11. 11.45 × 26 =
  12. 12.6 × 15 =
  13. 13.12 × 125 =
  14. 14.26 × 125 =
  15. 15.35 × 16 =
  16. 16.75 × 22 =
  17. 17.28 × 15 =
  18. 18.55 × 20 =
  19. 19.22 × 25 =
  20. 20.35 × 34 =
  21. 21.75 × 14 =
  22. 22.55 × 20 =
  23. 23.25 × 26 =
  24. 24.8 × 65 =
  25. 25.10 × 45 =
  26. 26.18 × 75 =
  27. 27.14 × 15 =
  28. 28.6 × 35 =
  29. 29.26 × 35 =
  30. 30.40 × 125 =
  31. 31.35 × 24 =
  32. 32.45 × 22 =
  33. 33.20 × 35 =
  34. 34.65 × 38 =
  35. 35.25 × 12 =
  36. 36.35 × 14 =
  37. 37.34 × 45 =
  38. 38.35 × 8 =
  39. 39.55 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 1400
  2. 150
  3. 300
  4. 570
  5. 1540
  6. 200
  7. 910
  8. 1620
  9. 150
  10. 1350
  11. 1170
  12. 90
  13. 1500
  14. 3250
  15. 560
  16. 1650
  17. 420
  18. 1100
  19. 550
  20. 1190
  21. 1050
  22. 1100
  23. 650
  24. 520
  25. 450
  26. 1350
  27. 210
  28. 210
  29. 910
  30. 5000
  31. 840
  32. 990
  33. 700
  34. 2470
  35. 300
  36. 490
  37. 1530
  38. 280
  39. 440
  40. 280

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