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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 193 · 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. 1.21 × 8 =
  2. 2.27 × 8 =
  3. 3.58 × 8 =
  4. 4.16 × 4 =
  5. 5.44 × 4 =
  6. 6.66 × 4 =
  7. 7.40 × 4 =
  8. 8.60 × 4 =
  9. 9.51 × 8 =
  10. 10.95 × 4 =
  11. 11.156 × 4 =
  12. 12.38 × 4 =
  13. 13.17 × 8 =
  14. 14.70 × 8 =
  15. 15.135 × 4 =
  16. 16.45 × 4 =
  17. 17.72 × 8 =
  18. 18.40 × 4 =
  19. 19.107 × 4 =
  20. 20.15 × 8 =
  21. 21.46 × 8 =
  22. 22.47 × 4 =
  23. 23.45 × 8 =
  24. 24.48 × 4 =
  25. 25.142 × 4 =
  26. 26.38 × 8 =
  27. 27.28 × 8 =
  28. 28.47 × 8 =
  29. 29.22 × 8 =
  30. 30.19 × 8 =
  31. 31.23 × 8 =
  32. 32.13 × 4 =
  33. 33.67 × 8 =
  34. 34.44 × 4 =
  35. 35.36 × 8 =
  36. 36.21 × 8 =
  37. 37.49 × 4 =
  38. 38.160 × 4 =
  39. 39.160 × 4 =
  40. 40.130 × 4 =

Answer key

  1. 168
  2. 216
  3. 464
  4. 64
  5. 176
  6. 264
  7. 160
  8. 240
  9. 408
  10. 380
  11. 624
  12. 152
  13. 136
  14. 560
  15. 540
  16. 180
  17. 576
  18. 160
  19. 428
  20. 120
  21. 368
  22. 188
  23. 360
  24. 192
  25. 568
  26. 304
  27. 224
  28. 376
  29. 176
  30. 152
  31. 184
  32. 52
  33. 536
  34. 176
  35. 288
  36. 168
  37. 196
  38. 640
  39. 640
  40. 520

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