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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 163 · 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. 1.141 × 4 =
  2. 2.55 × 8 =
  3. 3.150 × 4 =
  4. 4.69 × 8 =
  5. 5.72 × 8 =
  6. 6.74 × 8 =
  7. 7.113 × 4 =
  8. 8.24 × 8 =
  9. 9.26 × 8 =
  10. 10.57 × 8 =
  11. 11.65 × 8 =
  12. 12.63 × 8 =
  13. 13.70 × 8 =
  14. 14.22 × 8 =
  15. 15.158 × 4 =
  16. 16.60 × 8 =
  17. 17.120 × 4 =
  18. 18.30 × 8 =
  19. 19.45 × 8 =
  20. 20.152 × 4 =
  21. 21.24 × 4 =
  22. 22.31 × 8 =
  23. 23.79 × 4 =
  24. 24.35 × 8 =
  25. 25.25 × 4 =
  26. 26.56 × 8 =
  27. 27.143 × 4 =
  28. 28.47 × 8 =
  29. 29.93 × 4 =
  30. 30.125 × 4 =
  31. 31.156 × 4 =
  32. 32.49 × 8 =
  33. 33.63 × 4 =
  34. 34.54 × 4 =
  35. 35.100 × 4 =
  36. 36.31 × 8 =
  37. 37.19 × 8 =
  38. 38.47 × 4 =
  39. 39.12 × 8 =
  40. 40.69 × 4 =

Answer key

  1. 564
  2. 440
  3. 600
  4. 552
  5. 576
  6. 592
  7. 452
  8. 192
  9. 208
  10. 456
  11. 520
  12. 504
  13. 560
  14. 176
  15. 632
  16. 480
  17. 480
  18. 240
  19. 360
  20. 608
  21. 96
  22. 248
  23. 316
  24. 280
  25. 100
  26. 448
  27. 572
  28. 376
  29. 372
  30. 500
  31. 624
  32. 392
  33. 252
  34. 216
  35. 400
  36. 248
  37. 152
  38. 188
  39. 96
  40. 276

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