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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 34 · 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. 1.58 × 4 =
  2. 2.46 × 8 =
  3. 3.103 × 4 =
  4. 4.117 × 4 =
  5. 5.133 × 4 =
  6. 6.16 × 4 =
  7. 7.71 × 4 =
  8. 8.25 × 8 =
  9. 9.60 × 8 =
  10. 10.26 × 8 =
  11. 11.59 × 4 =
  12. 12.59 × 4 =
  13. 13.73 × 8 =
  14. 14.91 × 4 =
  15. 15.12 × 8 =
  16. 16.18 × 4 =
  17. 17.94 × 4 =
  18. 18.30 × 8 =
  19. 19.19 × 8 =
  20. 20.28 × 8 =
  21. 21.23 × 4 =
  22. 22.130 × 4 =
  23. 23.75 × 8 =
  24. 24.65 × 8 =
  25. 25.74 × 4 =
  26. 26.24 × 4 =
  27. 27.129 × 4 =
  28. 28.76 × 4 =
  29. 29.125 × 4 =
  30. 30.87 × 4 =
  31. 31.35 × 4 =
  32. 32.140 × 4 =
  33. 33.79 × 4 =
  34. 34.79 × 4 =
  35. 35.34 × 4 =
  36. 36.157 × 4 =
  37. 37.25 × 8 =
  38. 38.91 × 4 =
  39. 39.86 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 232
  2. 368
  3. 412
  4. 468
  5. 532
  6. 64
  7. 284
  8. 200
  9. 480
  10. 208
  11. 236
  12. 236
  13. 584
  14. 364
  15. 96
  16. 72
  17. 376
  18. 240
  19. 152
  20. 224
  21. 92
  22. 520
  23. 600
  24. 520
  25. 296
  26. 96
  27. 516
  28. 304
  29. 500
  30. 348
  31. 140
  32. 560
  33. 316
  34. 316
  35. 136
  36. 628
  37. 200
  38. 364
  39. 344
  40. 172

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