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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 392 · 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. 1.112 × 4 =
  2. 2.66 × 8 =
  3. 3.72 × 8 =
  4. 4.24 × 8 =
  5. 5.154 × 4 =
  6. 6.61 × 8 =
  7. 7.58 × 8 =
  8. 8.14 × 8 =
  9. 9.95 × 4 =
  10. 10.73 × 4 =
  11. 11.62 × 8 =
  12. 12.21 × 8 =
  13. 13.38 × 4 =
  14. 14.69 × 8 =
  15. 15.74 × 8 =
  16. 16.89 × 4 =
  17. 17.143 × 4 =
  18. 18.64 × 4 =
  19. 19.30 × 4 =
  20. 20.155 × 4 =
  21. 21.58 × 8 =
  22. 22.58 × 8 =
  23. 23.37 × 4 =
  24. 24.13 × 8 =
  25. 25.65 × 8 =
  26. 26.70 × 8 =
  27. 27.12 × 8 =
  28. 28.137 × 4 =
  29. 29.118 × 4 =
  30. 30.76 × 4 =
  31. 31.39 × 8 =
  32. 32.67 × 4 =
  33. 33.45 × 8 =
  34. 34.44 × 8 =
  35. 35.51 × 4 =
  36. 36.23 × 8 =
  37. 37.39 × 8 =
  38. 38.94 × 4 =
  39. 39.54 × 8 =
  40. 40.73 × 8 =

Answer key

  1. 448
  2. 528
  3. 576
  4. 192
  5. 616
  6. 488
  7. 464
  8. 112
  9. 380
  10. 292
  11. 496
  12. 168
  13. 152
  14. 552
  15. 592
  16. 356
  17. 572
  18. 256
  19. 120
  20. 620
  21. 464
  22. 464
  23. 148
  24. 104
  25. 520
  26. 560
  27. 96
  28. 548
  29. 472
  30. 304
  31. 312
  32. 268
  33. 360
  34. 352
  35. 204
  36. 184
  37. 312
  38. 376
  39. 432
  40. 584

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