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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 58 · 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. 1.44 × 8 =
  2. 2.65 × 8 =
  3. 3.75 × 8 =
  4. 4.19 × 8 =
  5. 5.54 × 8 =
  6. 6.63 × 4 =
  7. 7.32 × 4 =
  8. 8.107 × 4 =
  9. 9.45 × 4 =
  10. 10.56 × 8 =
  11. 11.49 × 8 =
  12. 12.105 × 4 =
  13. 13.18 × 8 =
  14. 14.25 × 8 =
  15. 15.138 × 4 =
  16. 16.93 × 4 =
  17. 17.37 × 8 =
  18. 18.99 × 4 =
  19. 19.46 × 4 =
  20. 20.154 × 4 =
  21. 21.109 × 4 =
  22. 22.152 × 4 =
  23. 23.55 × 8 =
  24. 24.58 × 4 =
  25. 25.63 × 8 =
  26. 26.124 × 4 =
  27. 27.35 × 8 =
  28. 28.75 × 8 =
  29. 29.133 × 4 =
  30. 30.87 × 4 =
  31. 31.40 × 4 =
  32. 32.18 × 8 =
  33. 33.51 × 8 =
  34. 34.47 × 8 =
  35. 35.36 × 4 =
  36. 36.131 × 4 =
  37. 37.124 × 4 =
  38. 38.58 × 8 =
  39. 39.23 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 352
  2. 520
  3. 600
  4. 152
  5. 432
  6. 252
  7. 128
  8. 428
  9. 180
  10. 448
  11. 392
  12. 420
  13. 144
  14. 200
  15. 552
  16. 372
  17. 296
  18. 396
  19. 184
  20. 616
  21. 436
  22. 608
  23. 440
  24. 232
  25. 504
  26. 496
  27. 280
  28. 600
  29. 532
  30. 348
  31. 160
  32. 144
  33. 408
  34. 376
  35. 144
  36. 524
  37. 496
  38. 464
  39. 184
  40. 224

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