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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 186 · 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 × 30 =
  2. 2.24 × 35 =
  3. 3.75 × 14 =
  4. 4.65 × 26 =
  5. 5.12 × 15 =
  6. 6.15 × 36 =
  7. 7.75 × 28 =
  8. 8.65 × 16 =
  9. 9.20 × 45 =
  10. 10.28 × 25 =
  11. 11.65 × 6 =
  12. 12.10 × 65 =
  13. 13.14 × 15 =
  14. 14.40 × 65 =
  15. 15.45 × 30 =
  16. 16.15 × 30 =
  17. 17.20 × 65 =
  18. 18.15 × 6 =
  19. 19.24 × 25 =
  20. 20.125 × 22 =
  21. 21.55 × 24 =
  22. 22.22 × 45 =
  23. 23.30 × 15 =
  24. 24.65 × 30 =
  25. 25.35 × 40 =
  26. 26.35 × 20 =
  27. 27.25 × 22 =
  28. 28.125 × 10 =
  29. 29.18 × 15 =
  30. 30.22 × 15 =
  31. 31.25 × 22 =
  32. 32.55 × 12 =
  33. 33.25 × 34 =
  34. 34.6 × 125 =
  35. 35.45 × 10 =
  36. 36.25 × 14 =
  37. 37.15 × 38 =
  38. 38.75 × 32 =
  39. 39.15 × 8 =
  40. 40.125 × 26 =

Answer key

  1. 1650
  2. 840
  3. 1050
  4. 1690
  5. 180
  6. 540
  7. 2100
  8. 1040
  9. 900
  10. 700
  11. 390
  12. 650
  13. 210
  14. 2600
  15. 1350
  16. 450
  17. 1300
  18. 90
  19. 600
  20. 2750
  21. 1320
  22. 990
  23. 450
  24. 1950
  25. 1400
  26. 700
  27. 550
  28. 1250
  29. 270
  30. 330
  31. 550
  32. 660
  33. 850
  34. 750
  35. 450
  36. 350
  37. 570
  38. 2400
  39. 120
  40. 3250

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