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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 944 · 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. 1.35 × 12 =
  2. 2.25 × 28 =
  3. 3.25 × 26 =
  4. 4.65 × 32 =
  5. 5.55 × 38 =
  6. 6.35 × 16 =
  7. 7.14 × 55 =
  8. 8.22 × 15 =
  9. 9.20 × 65 =
  10. 10.65 × 8 =
  11. 11.8 × 45 =
  12. 12.6 × 125 =
  13. 13.20 × 125 =
  14. 14.125 × 32 =
  15. 15.10 × 35 =
  16. 16.40 × 45 =
  17. 17.10 × 15 =
  18. 18.15 × 38 =
  19. 19.40 × 65 =
  20. 20.75 × 34 =
  21. 21.40 × 15 =
  22. 22.45 × 32 =
  23. 23.35 × 24 =
  24. 24.15 × 10 =
  25. 25.20 × 45 =
  26. 26.35 × 20 =
  27. 27.32 × 55 =
  28. 28.26 × 15 =
  29. 29.25 × 12 =
  30. 30.15 × 40 =
  31. 31.35 × 32 =
  32. 32.35 × 38 =
  33. 33.125 × 32 =
  34. 34.55 × 26 =
  35. 35.25 × 14 =
  36. 36.65 × 14 =
  37. 37.65 × 26 =
  38. 38.55 × 6 =
  39. 39.65 × 28 =
  40. 40.75 × 20 =

Answer key

  1. 420
  2. 700
  3. 650
  4. 2080
  5. 2090
  6. 560
  7. 770
  8. 330
  9. 1300
  10. 520
  11. 360
  12. 750
  13. 2500
  14. 4000
  15. 350
  16. 1800
  17. 150
  18. 570
  19. 2600
  20. 2550
  21. 600
  22. 1440
  23. 840
  24. 150
  25. 900
  26. 700
  27. 1760
  28. 390
  29. 300
  30. 600
  31. 1120
  32. 1330
  33. 4000
  34. 1430
  35. 350
  36. 910
  37. 1690
  38. 330
  39. 1820
  40. 1500

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