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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 279 · 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. 1.55 × 40 =
  2. 2.15 × 40 =
  3. 3.35 × 26 =
  4. 4.35 × 40 =
  5. 5.25 × 28 =
  6. 6.25 × 24 =
  7. 7.45 × 38 =
  8. 8.24 × 15 =
  9. 9.45 × 8 =
  10. 10.15 × 12 =
  11. 11.25 × 30 =
  12. 12.125 × 26 =
  13. 13.75 × 12 =
  14. 14.65 × 16 =
  15. 15.75 × 28 =
  16. 16.8 × 15 =
  17. 17.75 × 20 =
  18. 18.75 × 28 =
  19. 19.36 × 65 =
  20. 20.12 × 45 =
  21. 21.36 × 25 =
  22. 22.38 × 35 =
  23. 23.75 × 28 =
  24. 24.20 × 15 =
  25. 25.75 × 34 =
  26. 26.25 × 28 =
  27. 27.35 × 22 =
  28. 28.6 × 55 =
  29. 29.12 × 75 =
  30. 30.35 × 28 =
  31. 31.30 × 45 =
  32. 32.8 × 45 =
  33. 33.40 × 65 =
  34. 34.38 × 35 =
  35. 35.22 × 65 =
  36. 36.45 × 10 =
  37. 37.24 × 45 =
  38. 38.18 × 75 =
  39. 39.25 × 32 =
  40. 40.65 × 28 =

Answer key

  1. 2200
  2. 600
  3. 910
  4. 1400
  5. 700
  6. 600
  7. 1710
  8. 360
  9. 360
  10. 180
  11. 750
  12. 3250
  13. 900
  14. 1040
  15. 2100
  16. 120
  17. 1500
  18. 2100
  19. 2340
  20. 540
  21. 900
  22. 1330
  23. 2100
  24. 300
  25. 2550
  26. 700
  27. 770
  28. 330
  29. 900
  30. 980
  31. 1350
  32. 360
  33. 2600
  34. 1330
  35. 1430
  36. 450
  37. 1080
  38. 1350
  39. 800
  40. 1820

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