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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 323 · 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. 1.138 × 4 =
  2. 2.72 × 8 =
  3. 3.22 × 8 =
  4. 4.46 × 8 =
  5. 5.69 × 8 =
  6. 6.56 × 4 =
  7. 7.65 × 4 =
  8. 8.89 × 4 =
  9. 9.59 × 4 =
  10. 10.29 × 8 =
  11. 11.118 × 4 =
  12. 12.23 × 4 =
  13. 13.67 × 8 =
  14. 14.80 × 4 =
  15. 15.98 × 4 =
  16. 16.18 × 4 =
  17. 17.105 × 4 =
  18. 18.22 × 8 =
  19. 19.28 × 4 =
  20. 20.107 × 4 =
  21. 21.32 × 8 =
  22. 22.63 × 8 =
  23. 23.25 × 8 =
  24. 24.71 × 4 =
  25. 25.63 × 4 =
  26. 26.44 × 8 =
  27. 27.151 × 4 =
  28. 28.43 × 8 =
  29. 29.30 × 8 =
  30. 30.55 × 8 =
  31. 31.45 × 4 =
  32. 32.101 × 4 =
  33. 33.47 × 8 =
  34. 34.54 × 4 =
  35. 35.149 × 4 =
  36. 36.86 × 4 =
  37. 37.39 × 8 =
  38. 38.68 × 8 =
  39. 39.88 × 4 =
  40. 40.53 × 4 =

Answer key

  1. 552
  2. 576
  3. 176
  4. 368
  5. 552
  6. 224
  7. 260
  8. 356
  9. 236
  10. 232
  11. 472
  12. 92
  13. 536
  14. 320
  15. 392
  16. 72
  17. 420
  18. 176
  19. 112
  20. 428
  21. 256
  22. 504
  23. 200
  24. 284
  25. 252
  26. 352
  27. 604
  28. 344
  29. 240
  30. 440
  31. 180
  32. 404
  33. 376
  34. 216
  35. 596
  36. 344
  37. 312
  38. 544
  39. 352
  40. 212

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