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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 107 · 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. 1.36 × 4 =
  2. 2.17 × 8 =
  3. 3.52 × 8 =
  4. 4.42 × 8 =
  5. 5.36 × 8 =
  6. 6.56 × 8 =
  7. 7.135 × 4 =
  8. 8.103 × 4 =
  9. 9.75 × 4 =
  10. 10.31 × 8 =
  11. 11.99 × 4 =
  12. 12.76 × 4 =
  13. 13.140 × 4 =
  14. 14.76 × 4 =
  15. 15.75 × 4 =
  16. 16.19 × 4 =
  17. 17.66 × 4 =
  18. 18.20 × 8 =
  19. 19.13 × 8 =
  20. 20.96 × 4 =
  21. 21.14 × 4 =
  22. 22.111 × 4 =
  23. 23.54 × 8 =
  24. 24.102 × 4 =
  25. 25.54 × 8 =
  26. 26.20 × 8 =
  27. 27.41 × 4 =
  28. 28.75 × 8 =
  29. 29.44 × 4 =
  30. 30.19 × 4 =
  31. 31.57 × 4 =
  32. 32.154 × 4 =
  33. 33.61 × 4 =
  34. 34.47 × 8 =
  35. 35.73 × 8 =
  36. 36.31 × 8 =
  37. 37.49 × 8 =
  38. 38.53 × 8 =
  39. 39.143 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 144
  2. 136
  3. 416
  4. 336
  5. 288
  6. 448
  7. 540
  8. 412
  9. 300
  10. 248
  11. 396
  12. 304
  13. 560
  14. 304
  15. 300
  16. 76
  17. 264
  18. 160
  19. 104
  20. 384
  21. 56
  22. 444
  23. 432
  24. 408
  25. 432
  26. 160
  27. 164
  28. 600
  29. 176
  30. 76
  31. 228
  32. 616
  33. 244
  34. 376
  35. 584
  36. 248
  37. 392
  38. 424
  39. 572
  40. 432

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