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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 995 · 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. 1.75 × 16 =
  2. 2.10 × 65 =
  3. 3.55 × 34 =
  4. 4.36 × 125 =
  5. 5.65 × 10 =
  6. 6.35 × 14 =
  7. 7.125 × 22 =
  8. 8.12 × 55 =
  9. 9.125 × 16 =
  10. 10.15 × 14 =
  11. 11.18 × 45 =
  12. 12.15 × 22 =
  13. 13.25 × 14 =
  14. 14.22 × 65 =
  15. 15.32 × 15 =
  16. 16.45 × 14 =
  17. 17.28 × 25 =
  18. 18.16 × 65 =
  19. 19.65 × 16 =
  20. 20.20 × 75 =
  21. 21.25 × 10 =
  22. 22.22 × 55 =
  23. 23.8 × 75 =
  24. 24.18 × 75 =
  25. 25.45 × 34 =
  26. 26.45 × 14 =
  27. 27.15 × 38 =
  28. 28.30 × 45 =
  29. 29.6 × 65 =
  30. 30.55 × 36 =
  31. 31.65 × 36 =
  32. 32.15 × 40 =
  33. 33.25 × 36 =
  34. 34.36 × 45 =
  35. 35.40 × 25 =
  36. 36.10 × 125 =
  37. 37.15 × 16 =
  38. 38.45 × 36 =
  39. 39.45 × 24 =
  40. 40.35 × 24 =

Answer key

  1. 1200
  2. 650
  3. 1870
  4. 4500
  5. 650
  6. 490
  7. 2750
  8. 660
  9. 2000
  10. 210
  11. 810
  12. 330
  13. 350
  14. 1430
  15. 480
  16. 630
  17. 700
  18. 1040
  19. 1040
  20. 1500
  21. 250
  22. 1210
  23. 600
  24. 1350
  25. 1530
  26. 630
  27. 570
  28. 1350
  29. 390
  30. 1980
  31. 2340
  32. 600
  33. 900
  34. 1620
  35. 1000
  36. 1250
  37. 240
  38. 1620
  39. 1080
  40. 840

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