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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 347 · 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. 1.26 × 55 =
  2. 2.14 × 15 =
  3. 3.8 × 15 =
  4. 4.35 × 12 =
  5. 5.45 × 10 =
  6. 6.15 × 16 =
  7. 7.45 × 22 =
  8. 8.35 × 30 =
  9. 9.22 × 65 =
  10. 10.55 × 24 =
  11. 11.30 × 45 =
  12. 12.75 × 34 =
  13. 13.10 × 55 =
  14. 14.14 × 45 =
  15. 15.12 × 75 =
  16. 16.65 × 30 =
  17. 17.12 × 25 =
  18. 18.40 × 15 =
  19. 19.55 × 8 =
  20. 20.45 × 14 =
  21. 21.35 × 8 =
  22. 22.65 × 14 =
  23. 23.65 × 10 =
  24. 24.30 × 125 =
  25. 25.65 × 22 =
  26. 26.34 × 125 =
  27. 27.45 × 38 =
  28. 28.75 × 34 =
  29. 29.65 × 14 =
  30. 30.125 × 6 =
  31. 31.35 × 16 =
  32. 32.55 × 16 =
  33. 33.15 × 18 =
  34. 34.15 × 22 =
  35. 35.26 × 15 =
  36. 36.15 × 8 =
  37. 37.12 × 75 =
  38. 38.75 × 38 =
  39. 39.45 × 16 =
  40. 40.15 × 26 =

Answer key

  1. 1430
  2. 210
  3. 120
  4. 420
  5. 450
  6. 240
  7. 990
  8. 1050
  9. 1430
  10. 1320
  11. 1350
  12. 2550
  13. 550
  14. 630
  15. 900
  16. 1950
  17. 300
  18. 600
  19. 440
  20. 630
  21. 280
  22. 910
  23. 650
  24. 3750
  25. 1430
  26. 4250
  27. 1710
  28. 2550
  29. 910
  30. 750
  31. 560
  32. 880
  33. 270
  34. 330
  35. 390
  36. 120
  37. 900
  38. 2850
  39. 720
  40. 390

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