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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 667 · 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. 1.66 × 4 =
  2. 2.111 × 4 =
  3. 3.15 × 4 =
  4. 4.139 × 4 =
  5. 5.29 × 8 =
  6. 6.129 × 4 =
  7. 7.74 × 8 =
  8. 8.75 × 8 =
  9. 9.27 × 8 =
  10. 10.136 × 4 =
  11. 11.43 × 4 =
  12. 12.146 × 4 =
  13. 13.67 × 4 =
  14. 14.34 × 8 =
  15. 15.68 × 8 =
  16. 16.156 × 4 =
  17. 17.130 × 4 =
  18. 18.112 × 4 =
  19. 19.78 × 4 =
  20. 20.27 × 8 =
  21. 21.66 × 8 =
  22. 22.45 × 8 =
  23. 23.30 × 4 =
  24. 24.52 × 8 =
  25. 25.32 × 4 =
  26. 26.94 × 4 =
  27. 27.46 × 8 =
  28. 28.66 × 4 =
  29. 29.74 × 4 =
  30. 30.45 × 8 =
  31. 31.50 × 4 =
  32. 32.146 × 4 =
  33. 33.54 × 4 =
  34. 34.60 × 8 =
  35. 35.27 × 8 =
  36. 36.37 × 8 =
  37. 37.113 × 4 =
  38. 38.42 × 8 =
  39. 39.52 × 8 =
  40. 40.95 × 4 =

Answer key

  1. 264
  2. 444
  3. 60
  4. 556
  5. 232
  6. 516
  7. 592
  8. 600
  9. 216
  10. 544
  11. 172
  12. 584
  13. 268
  14. 272
  15. 544
  16. 624
  17. 520
  18. 448
  19. 312
  20. 216
  21. 528
  22. 360
  23. 120
  24. 416
  25. 128
  26. 376
  27. 368
  28. 264
  29. 296
  30. 360
  31. 200
  32. 584
  33. 216
  34. 480
  35. 216
  36. 296
  37. 452
  38. 336
  39. 416
  40. 380

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