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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 753 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.153 × 4 =
  2. 2.41 × 8 =
  3. 3.39 × 4 =
  4. 4.38 × 8 =
  5. 5.143 × 4 =
  6. 6.60 × 4 =
  7. 7.51 × 8 =
  8. 8.114 × 4 =
  9. 9.42 × 8 =
  10. 10.17 × 8 =
  11. 11.116 × 4 =
  12. 12.63 × 4 =
  13. 13.85 × 4 =
  14. 14.21 × 4 =
  15. 15.17 × 8 =
  16. 16.111 × 4 =
  17. 17.79 × 4 =
  18. 18.28 × 8 =
  19. 19.68 × 4 =
  20. 20.130 × 4 =
  21. 21.27 × 4 =
  22. 22.37 × 8 =
  23. 23.35 × 4 =
  24. 24.15 × 4 =
  25. 25.21 × 4 =
  26. 26.47 × 8 =
  27. 27.104 × 4 =
  28. 28.24 × 8 =
  29. 29.152 × 4 =
  30. 30.140 × 4 =
  31. 31.28 × 4 =
  32. 32.21 × 4 =
  33. 33.92 × 4 =
  34. 34.21 × 4 =
  35. 35.69 × 8 =
  36. 36.28 × 8 =
  37. 37.45 × 8 =
  38. 38.28 × 8 =
  39. 39.49 × 8 =
  40. 40.55 × 8 =

Answer key

  1. 612
  2. 328
  3. 156
  4. 304
  5. 572
  6. 240
  7. 408
  8. 456
  9. 336
  10. 136
  11. 464
  12. 252
  13. 340
  14. 84
  15. 136
  16. 444
  17. 316
  18. 224
  19. 272
  20. 520
  21. 108
  22. 296
  23. 140
  24. 60
  25. 84
  26. 376
  27. 416
  28. 192
  29. 608
  30. 560
  31. 112
  32. 84
  33. 368
  34. 84
  35. 552
  36. 224
  37. 360
  38. 224
  39. 392
  40. 440

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