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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 491 · 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. 1.19 × 8 =
  2. 2.20 × 8 =
  3. 3.119 × 4 =
  4. 4.24 × 4 =
  5. 5.62 × 4 =
  6. 6.21 × 4 =
  7. 7.26 × 8 =
  8. 8.21 × 8 =
  9. 9.56 × 4 =
  10. 10.58 × 4 =
  11. 11.44 × 4 =
  12. 12.31 × 8 =
  13. 13.73 × 8 =
  14. 14.95 × 4 =
  15. 15.32 × 8 =
  16. 16.45 × 8 =
  17. 17.59 × 8 =
  18. 18.53 × 4 =
  19. 19.64 × 4 =
  20. 20.100 × 4 =
  21. 21.137 × 4 =
  22. 22.134 × 4 =
  23. 23.33 × 4 =
  24. 24.52 × 8 =
  25. 25.55 × 4 =
  26. 26.41 × 4 =
  27. 27.148 × 4 =
  28. 28.43 × 4 =
  29. 29.73 × 8 =
  30. 30.28 × 8 =
  31. 31.140 × 4 =
  32. 32.134 × 4 =
  33. 33.15 × 4 =
  34. 34.82 × 4 =
  35. 35.61 × 8 =
  36. 36.100 × 4 =
  37. 37.59 × 8 =
  38. 38.82 × 4 =
  39. 39.33 × 4 =
  40. 40.56 × 8 =

Answer key

  1. 152
  2. 160
  3. 476
  4. 96
  5. 248
  6. 84
  7. 208
  8. 168
  9. 224
  10. 232
  11. 176
  12. 248
  13. 584
  14. 380
  15. 256
  16. 360
  17. 472
  18. 212
  19. 256
  20. 400
  21. 548
  22. 536
  23. 132
  24. 416
  25. 220
  26. 164
  27. 592
  28. 172
  29. 584
  30. 224
  31. 560
  32. 536
  33. 60
  34. 328
  35. 488
  36. 400
  37. 472
  38. 328
  39. 132
  40. 448

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