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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 465 · 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. 1.8 × 35 =
  2. 2.22 × 55 =
  3. 3.28 × 65 =
  4. 4.45 × 32 =
  5. 5.65 × 36 =
  6. 6.45 × 6 =
  7. 7.75 × 12 =
  8. 8.12 × 25 =
  9. 9.24 × 45 =
  10. 10.55 × 26 =
  11. 11.15 × 34 =
  12. 12.125 × 6 =
  13. 13.6 × 35 =
  14. 14.25 × 28 =
  15. 15.24 × 75 =
  16. 16.125 × 34 =
  17. 17.35 × 18 =
  18. 18.55 × 26 =
  19. 19.45 × 18 =
  20. 20.12 × 75 =
  21. 21.6 × 65 =
  22. 22.25 × 12 =
  23. 23.36 × 125 =
  24. 24.8 × 15 =
  25. 25.65 × 14 =
  26. 26.28 × 35 =
  27. 27.30 × 55 =
  28. 28.55 × 22 =
  29. 29.12 × 55 =
  30. 30.35 × 24 =
  31. 31.15 × 34 =
  32. 32.16 × 55 =
  33. 33.35 × 38 =
  34. 34.55 × 24 =
  35. 35.26 × 75 =
  36. 36.28 × 45 =
  37. 37.40 × 45 =
  38. 38.45 × 16 =
  39. 39.26 × 35 =
  40. 40.30 × 35 =

Answer key

  1. 280
  2. 1210
  3. 1820
  4. 1440
  5. 2340
  6. 270
  7. 900
  8. 300
  9. 1080
  10. 1430
  11. 510
  12. 750
  13. 210
  14. 700
  15. 1800
  16. 4250
  17. 630
  18. 1430
  19. 810
  20. 900
  21. 390
  22. 300
  23. 4500
  24. 120
  25. 910
  26. 980
  27. 1650
  28. 1210
  29. 660
  30. 840
  31. 510
  32. 880
  33. 1330
  34. 1320
  35. 1950
  36. 1260
  37. 1800
  38. 720
  39. 910
  40. 1050

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