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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 774 · 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. 1.73 × 8 =
  2. 2.36 × 8 =
  3. 3.133 × 4 =
  4. 4.76 × 4 =
  5. 5.38 × 4 =
  6. 6.111 × 4 =
  7. 7.120 × 4 =
  8. 8.160 × 4 =
  9. 9.111 × 4 =
  10. 10.72 × 8 =
  11. 11.55 × 4 =
  12. 12.143 × 4 =
  13. 13.43 × 4 =
  14. 14.134 × 4 =
  15. 15.37 × 4 =
  16. 16.19 × 8 =
  17. 17.85 × 4 =
  18. 18.37 × 4 =
  19. 19.102 × 4 =
  20. 20.120 × 4 =
  21. 21.19 × 8 =
  22. 22.25 × 4 =
  23. 23.60 × 8 =
  24. 24.80 × 4 =
  25. 25.70 × 8 =
  26. 26.27 × 8 =
  27. 27.35 × 8 =
  28. 28.62 × 8 =
  29. 29.75 × 8 =
  30. 30.24 × 8 =
  31. 31.53 × 8 =
  32. 32.27 × 4 =
  33. 33.53 × 8 =
  34. 34.69 × 8 =
  35. 35.159 × 4 =
  36. 36.65 × 8 =
  37. 37.57 × 8 =
  38. 38.59 × 8 =
  39. 39.49 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 584
  2. 288
  3. 532
  4. 304
  5. 152
  6. 444
  7. 480
  8. 640
  9. 444
  10. 576
  11. 220
  12. 572
  13. 172
  14. 536
  15. 148
  16. 152
  17. 340
  18. 148
  19. 408
  20. 480
  21. 152
  22. 100
  23. 480
  24. 320
  25. 560
  26. 216
  27. 280
  28. 496
  29. 600
  30. 192
  31. 424
  32. 108
  33. 424
  34. 552
  35. 636
  36. 520
  37. 456
  38. 472
  39. 392
  40. 320

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