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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 272 · 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. 1.27 × 8 =
  2. 2.41 × 8 =
  3. 3.34 × 8 =
  4. 4.84 × 4 =
  5. 5.70 × 4 =
  6. 6.43 × 8 =
  7. 7.27 × 8 =
  8. 8.130 × 4 =
  9. 9.154 × 4 =
  10. 10.60 × 8 =
  11. 11.138 × 4 =
  12. 12.43 × 4 =
  13. 13.13 × 4 =
  14. 14.72 × 8 =
  15. 15.21 × 8 =
  16. 16.57 × 4 =
  17. 17.94 × 4 =
  18. 18.52 × 4 =
  19. 19.111 × 4 =
  20. 20.119 × 4 =
  21. 21.98 × 4 =
  22. 22.20 × 8 =
  23. 23.65 × 8 =
  24. 24.101 × 4 =
  25. 25.24 × 4 =
  26. 26.15 × 8 =
  27. 27.57 × 8 =
  28. 28.33 × 8 =
  29. 29.44 × 8 =
  30. 30.46 × 4 =
  31. 31.61 × 8 =
  32. 32.39 × 4 =
  33. 33.38 × 8 =
  34. 34.58 × 4 =
  35. 35.45 × 4 =
  36. 36.44 × 8 =
  37. 37.92 × 4 =
  38. 38.33 × 8 =
  39. 39.101 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 216
  2. 328
  3. 272
  4. 336
  5. 280
  6. 344
  7. 216
  8. 520
  9. 616
  10. 480
  11. 552
  12. 172
  13. 52
  14. 576
  15. 168
  16. 228
  17. 376
  18. 208
  19. 444
  20. 476
  21. 392
  22. 160
  23. 520
  24. 404
  25. 96
  26. 120
  27. 456
  28. 264
  29. 352
  30. 184
  31. 488
  32. 156
  33. 304
  34. 232
  35. 180
  36. 352
  37. 368
  38. 264
  39. 404
  40. 136

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