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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 173 · 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. 1.111 × 4 =
  2. 2.87 × 4 =
  3. 3.39 × 8 =
  4. 4.12 × 8 =
  5. 5.21 × 8 =
  6. 6.45 × 4 =
  7. 7.52 × 8 =
  8. 8.84 × 4 =
  9. 9.99 × 4 =
  10. 10.33 × 4 =
  11. 11.110 × 4 =
  12. 12.71 × 4 =
  13. 13.107 × 4 =
  14. 14.103 × 4 =
  15. 15.66 × 4 =
  16. 16.37 × 4 =
  17. 17.20 × 8 =
  18. 18.138 × 4 =
  19. 19.42 × 4 =
  20. 20.41 × 8 =
  21. 21.53 × 4 =
  22. 22.67 × 4 =
  23. 23.26 × 8 =
  24. 24.25 × 4 =
  25. 25.50 × 8 =
  26. 26.28 × 8 =
  27. 27.62 × 8 =
  28. 28.55 × 4 =
  29. 29.98 × 4 =
  30. 30.37 × 8 =
  31. 31.30 × 4 =
  32. 32.55 × 8 =
  33. 33.30 × 8 =
  34. 34.124 × 4 =
  35. 35.60 × 8 =
  36. 36.70 × 8 =
  37. 37.22 × 8 =
  38. 38.67 × 4 =
  39. 39.151 × 4 =
  40. 40.138 × 4 =

Answer key

  1. 444
  2. 348
  3. 312
  4. 96
  5. 168
  6. 180
  7. 416
  8. 336
  9. 396
  10. 132
  11. 440
  12. 284
  13. 428
  14. 412
  15. 264
  16. 148
  17. 160
  18. 552
  19. 168
  20. 328
  21. 212
  22. 268
  23. 208
  24. 100
  25. 400
  26. 224
  27. 496
  28. 220
  29. 392
  30. 296
  31. 120
  32. 440
  33. 240
  34. 496
  35. 480
  36. 560
  37. 176
  38. 268
  39. 604
  40. 552

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