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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 754 · 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. 1.25 × 6 =
  2. 2.125 × 24 =
  3. 3.36 × 15 =
  4. 4.75 × 34 =
  5. 5.6 × 45 =
  6. 6.75 × 36 =
  7. 7.6 × 65 =
  8. 8.125 × 16 =
  9. 9.35 × 34 =
  10. 10.15 × 12 =
  11. 11.12 × 75 =
  12. 12.28 × 25 =
  13. 13.125 × 8 =
  14. 14.65 × 28 =
  15. 15.15 × 14 =
  16. 16.32 × 75 =
  17. 17.10 × 125 =
  18. 18.34 × 45 =
  19. 19.15 × 32 =
  20. 20.22 × 65 =
  21. 21.65 × 18 =
  22. 22.35 × 34 =
  23. 23.12 × 55 =
  24. 24.30 × 75 =
  25. 25.20 × 55 =
  26. 26.65 × 28 =
  27. 27.38 × 35 =
  28. 28.45 × 30 =
  29. 29.34 × 15 =
  30. 30.125 × 12 =
  31. 31.15 × 28 =
  32. 32.25 × 22 =
  33. 33.45 × 18 =
  34. 34.15 × 34 =
  35. 35.45 × 32 =
  36. 36.36 × 125 =
  37. 37.125 × 18 =
  38. 38.14 × 15 =
  39. 39.75 × 22 =
  40. 40.30 × 55 =

Answer key

  1. 150
  2. 3000
  3. 540
  4. 2550
  5. 270
  6. 2700
  7. 390
  8. 2000
  9. 1190
  10. 180
  11. 900
  12. 700
  13. 1000
  14. 1820
  15. 210
  16. 2400
  17. 1250
  18. 1530
  19. 480
  20. 1430
  21. 1170
  22. 1190
  23. 660
  24. 2250
  25. 1100
  26. 1820
  27. 1330
  28. 1350
  29. 510
  30. 1500
  31. 420
  32. 550
  33. 810
  34. 510
  35. 1440
  36. 4500
  37. 2250
  38. 210
  39. 1650
  40. 1650

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