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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 669 · 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. 1.146 × 4 =
  2. 2.12 × 8 =
  3. 3.49 × 8 =
  4. 4.101 × 4 =
  5. 5.46 × 4 =
  6. 6.57 × 8 =
  7. 7.48 × 4 =
  8. 8.151 × 4 =
  9. 9.51 × 4 =
  10. 10.37 × 8 =
  11. 11.42 × 8 =
  12. 12.69 × 8 =
  13. 13.94 × 4 =
  14. 14.120 × 4 =
  15. 15.18 × 8 =
  16. 16.18 × 4 =
  17. 17.23 × 8 =
  18. 18.156 × 4 =
  19. 19.52 × 8 =
  20. 20.18 × 4 =
  21. 21.75 × 8 =
  22. 22.15 × 4 =
  23. 23.66 × 4 =
  24. 24.140 × 4 =
  25. 25.148 × 4 =
  26. 26.51 × 8 =
  27. 27.73 × 8 =
  28. 28.145 × 4 =
  29. 29.57 × 8 =
  30. 30.45 × 8 =
  31. 31.67 × 8 =
  32. 32.159 × 4 =
  33. 33.68 × 8 =
  34. 34.32 × 8 =
  35. 35.92 × 4 =
  36. 36.46 × 8 =
  37. 37.61 × 4 =
  38. 38.65 × 4 =
  39. 39.37 × 4 =
  40. 40.149 × 4 =

Answer key

  1. 584
  2. 96
  3. 392
  4. 404
  5. 184
  6. 456
  7. 192
  8. 604
  9. 204
  10. 296
  11. 336
  12. 552
  13. 376
  14. 480
  15. 144
  16. 72
  17. 184
  18. 624
  19. 416
  20. 72
  21. 600
  22. 60
  23. 264
  24. 560
  25. 592
  26. 408
  27. 584
  28. 580
  29. 456
  30. 360
  31. 536
  32. 636
  33. 544
  34. 256
  35. 368
  36. 368
  37. 244
  38. 260
  39. 148
  40. 596

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