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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 783 · 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. 1.60 × 8 =
  2. 2.60 × 8 =
  3. 3.12 × 8 =
  4. 4.59 × 8 =
  5. 5.54 × 4 =
  6. 6.52 × 4 =
  7. 7.56 × 8 =
  8. 8.153 × 4 =
  9. 9.42 × 8 =
  10. 10.43 × 4 =
  11. 11.35 × 4 =
  12. 12.120 × 4 =
  13. 13.92 × 4 =
  14. 14.112 × 4 =
  15. 15.19 × 4 =
  16. 16.29 × 4 =
  17. 17.49 × 4 =
  18. 18.134 × 4 =
  19. 19.23 × 8 =
  20. 20.22 × 4 =
  21. 21.34 × 8 =
  22. 22.70 × 8 =
  23. 23.47 × 8 =
  24. 24.31 × 8 =
  25. 25.20 × 8 =
  26. 26.68 × 8 =
  27. 27.22 × 4 =
  28. 28.14 × 8 =
  29. 29.73 × 8 =
  30. 30.41 × 8 =
  31. 31.57 × 4 =
  32. 32.128 × 4 =
  33. 33.54 × 4 =
  34. 34.75 × 8 =
  35. 35.35 × 8 =
  36. 36.73 × 8 =
  37. 37.62 × 4 =
  38. 38.87 × 4 =
  39. 39.153 × 4 =
  40. 40.83 × 4 =

Answer key

  1. 480
  2. 480
  3. 96
  4. 472
  5. 216
  6. 208
  7. 448
  8. 612
  9. 336
  10. 172
  11. 140
  12. 480
  13. 368
  14. 448
  15. 76
  16. 116
  17. 196
  18. 536
  19. 184
  20. 88
  21. 272
  22. 560
  23. 376
  24. 248
  25. 160
  26. 544
  27. 88
  28. 112
  29. 584
  30. 328
  31. 228
  32. 512
  33. 216
  34. 600
  35. 280
  36. 584
  37. 248
  38. 348
  39. 612
  40. 332

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