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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 275 · 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. 1.51 × 4 =
  2. 2.74 × 8 =
  3. 3.62 × 4 =
  4. 4.137 × 4 =
  5. 5.144 × 4 =
  6. 6.56 × 8 =
  7. 7.60 × 4 =
  8. 8.53 × 4 =
  9. 9.17 × 8 =
  10. 10.116 × 4 =
  11. 11.58 × 8 =
  12. 12.51 × 8 =
  13. 13.45 × 4 =
  14. 14.61 × 8 =
  15. 15.117 × 4 =
  16. 16.70 × 8 =
  17. 17.113 × 4 =
  18. 18.92 × 4 =
  19. 19.70 × 4 =
  20. 20.61 × 4 =
  21. 21.146 × 4 =
  22. 22.20 × 8 =
  23. 23.79 × 4 =
  24. 24.29 × 8 =
  25. 25.40 × 8 =
  26. 26.49 × 8 =
  27. 27.38 × 4 =
  28. 28.154 × 4 =
  29. 29.40 × 8 =
  30. 30.64 × 8 =
  31. 31.140 × 4 =
  32. 32.42 × 4 =
  33. 33.124 × 4 =
  34. 34.29 × 8 =
  35. 35.24 × 8 =
  36. 36.37 × 8 =
  37. 37.48 × 8 =
  38. 38.19 × 4 =
  39. 39.133 × 4 =
  40. 40.40 × 8 =

Answer key

  1. 204
  2. 592
  3. 248
  4. 548
  5. 576
  6. 448
  7. 240
  8. 212
  9. 136
  10. 464
  11. 464
  12. 408
  13. 180
  14. 488
  15. 468
  16. 560
  17. 452
  18. 368
  19. 280
  20. 244
  21. 584
  22. 160
  23. 316
  24. 232
  25. 320
  26. 392
  27. 152
  28. 616
  29. 320
  30. 512
  31. 560
  32. 168
  33. 496
  34. 232
  35. 192
  36. 296
  37. 384
  38. 76
  39. 532
  40. 320

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