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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 689 · 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 × 75 =
  2. 2.55 × 20 =
  3. 3.28 × 15 =
  4. 4.14 × 45 =
  5. 5.26 × 25 =
  6. 6.65 × 8 =
  7. 7.22 × 125 =
  8. 8.32 × 35 =
  9. 9.16 × 125 =
  10. 10.45 × 36 =
  11. 11.45 × 36 =
  12. 12.65 × 22 =
  13. 13.15 × 40 =
  14. 14.75 × 6 =
  15. 15.25 × 22 =
  16. 16.65 × 16 =
  17. 17.26 × 55 =
  18. 18.26 × 55 =
  19. 19.32 × 55 =
  20. 20.26 × 75 =
  21. 21.15 × 20 =
  22. 22.34 × 35 =
  23. 23.14 × 45 =
  24. 24.26 × 15 =
  25. 25.65 × 30 =
  26. 26.65 × 22 =
  27. 27.15 × 22 =
  28. 28.75 × 20 =
  29. 29.30 × 25 =
  30. 30.45 × 20 =
  31. 31.14 × 35 =
  32. 32.35 × 8 =
  33. 33.75 × 40 =
  34. 34.10 × 15 =
  35. 35.12 × 15 =
  36. 36.18 × 75 =
  37. 37.75 × 8 =
  38. 38.55 × 40 =
  39. 39.38 × 15 =
  40. 40.16 × 55 =

Answer key

  1. 1050
  2. 1100
  3. 420
  4. 630
  5. 650
  6. 520
  7. 2750
  8. 1120
  9. 2000
  10. 1620
  11. 1620
  12. 1430
  13. 600
  14. 450
  15. 550
  16. 1040
  17. 1430
  18. 1430
  19. 1760
  20. 1950
  21. 300
  22. 1190
  23. 630
  24. 390
  25. 1950
  26. 1430
  27. 330
  28. 1500
  29. 750
  30. 900
  31. 490
  32. 280
  33. 3000
  34. 150
  35. 180
  36. 1350
  37. 600
  38. 2200
  39. 570
  40. 880

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