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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 832 · 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. 1.73 × 8 =
  2. 2.124 × 4 =
  3. 3.23 × 8 =
  4. 4.157 × 4 =
  5. 5.120 × 4 =
  6. 6.41 × 8 =
  7. 7.86 × 4 =
  8. 8.93 × 4 =
  9. 9.56 × 4 =
  10. 10.66 × 8 =
  11. 11.12 × 8 =
  12. 12.60 × 8 =
  13. 13.65 × 4 =
  14. 14.132 × 4 =
  15. 15.143 × 4 =
  16. 16.59 × 8 =
  17. 17.71 × 4 =
  18. 18.59 × 8 =
  19. 19.69 × 4 =
  20. 20.63 × 4 =
  21. 21.70 × 4 =
  22. 22.82 × 4 =
  23. 23.63 × 8 =
  24. 24.23 × 4 =
  25. 25.55 × 8 =
  26. 26.35 × 4 =
  27. 27.14 × 8 =
  28. 28.53 × 8 =
  29. 29.47 × 4 =
  30. 30.103 × 4 =
  31. 31.129 × 4 =
  32. 32.70 × 8 =
  33. 33.65 × 4 =
  34. 34.17 × 4 =
  35. 35.84 × 4 =
  36. 36.48 × 8 =
  37. 37.47 × 8 =
  38. 38.83 × 4 =
  39. 39.112 × 4 =
  40. 40.92 × 4 =

Answer key

  1. 584
  2. 496
  3. 184
  4. 628
  5. 480
  6. 328
  7. 344
  8. 372
  9. 224
  10. 528
  11. 96
  12. 480
  13. 260
  14. 528
  15. 572
  16. 472
  17. 284
  18. 472
  19. 276
  20. 252
  21. 280
  22. 328
  23. 504
  24. 92
  25. 440
  26. 140
  27. 112
  28. 424
  29. 188
  30. 412
  31. 516
  32. 560
  33. 260
  34. 68
  35. 336
  36. 384
  37. 376
  38. 332
  39. 448
  40. 368

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