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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 572 · 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. 1.15 × 8 =
  2. 2.65 × 8 =
  3. 3.60 × 8 =
  4. 4.96 × 4 =
  5. 5.26 × 4 =
  6. 6.23 × 8 =
  7. 7.55 × 8 =
  8. 8.45 × 8 =
  9. 9.43 × 4 =
  10. 10.52 × 8 =
  11. 11.27 × 8 =
  12. 12.76 × 4 =
  13. 13.40 × 4 =
  14. 14.34 × 8 =
  15. 15.27 × 8 =
  16. 16.74 × 8 =
  17. 17.96 × 4 =
  18. 18.46 × 4 =
  19. 19.59 × 4 =
  20. 20.148 × 4 =
  21. 21.26 × 8 =
  22. 22.127 × 4 =
  23. 23.83 × 4 =
  24. 24.42 × 4 =
  25. 25.43 × 8 =
  26. 26.37 × 8 =
  27. 27.58 × 4 =
  28. 28.78 × 4 =
  29. 29.22 × 8 =
  30. 30.52 × 8 =
  31. 31.20 × 4 =
  32. 32.42 × 4 =
  33. 33.100 × 4 =
  34. 34.41 × 8 =
  35. 35.56 × 8 =
  36. 36.48 × 8 =
  37. 37.15 × 8 =
  38. 38.140 × 4 =
  39. 39.72 × 8 =
  40. 40.136 × 4 =

Answer key

  1. 120
  2. 520
  3. 480
  4. 384
  5. 104
  6. 184
  7. 440
  8. 360
  9. 172
  10. 416
  11. 216
  12. 304
  13. 160
  14. 272
  15. 216
  16. 592
  17. 384
  18. 184
  19. 236
  20. 592
  21. 208
  22. 508
  23. 332
  24. 168
  25. 344
  26. 296
  27. 232
  28. 312
  29. 176
  30. 416
  31. 80
  32. 168
  33. 400
  34. 328
  35. 448
  36. 384
  37. 120
  38. 560
  39. 576
  40. 544

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