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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 297 · 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. 1.57 × 8 =
  2. 2.112 × 4 =
  3. 3.35 × 8 =
  4. 4.72 × 8 =
  5. 5.24 × 4 =
  6. 6.111 × 4 =
  7. 7.30 × 8 =
  8. 8.71 × 8 =
  9. 9.61 × 4 =
  10. 10.24 × 8 =
  11. 11.35 × 8 =
  12. 12.35 × 8 =
  13. 13.102 × 4 =
  14. 14.99 × 4 =
  15. 15.114 × 4 =
  16. 16.27 × 8 =
  17. 17.151 × 4 =
  18. 18.33 × 8 =
  19. 19.112 × 4 =
  20. 20.87 × 4 =
  21. 21.69 × 4 =
  22. 22.27 × 8 =
  23. 23.101 × 4 =
  24. 24.49 × 8 =
  25. 25.154 × 4 =
  26. 26.16 × 8 =
  27. 27.35 × 8 =
  28. 28.61 × 4 =
  29. 29.14 × 8 =
  30. 30.57 × 8 =
  31. 31.29 × 4 =
  32. 32.93 × 4 =
  33. 33.30 × 4 =
  34. 34.43 × 8 =
  35. 35.50 × 8 =
  36. 36.72 × 8 =
  37. 37.61 × 8 =
  38. 38.110 × 4 =
  39. 39.53 × 8 =
  40. 40.133 × 4 =

Answer key

  1. 456
  2. 448
  3. 280
  4. 576
  5. 96
  6. 444
  7. 240
  8. 568
  9. 244
  10. 192
  11. 280
  12. 280
  13. 408
  14. 396
  15. 456
  16. 216
  17. 604
  18. 264
  19. 448
  20. 348
  21. 276
  22. 216
  23. 404
  24. 392
  25. 616
  26. 128
  27. 280
  28. 244
  29. 112
  30. 456
  31. 116
  32. 372
  33. 120
  34. 344
  35. 400
  36. 576
  37. 488
  38. 440
  39. 424
  40. 532

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