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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 822 · 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. 1.39 × 8 =
  2. 2.121 × 4 =
  3. 3.73 × 8 =
  4. 4.26 × 8 =
  5. 5.101 × 4 =
  6. 6.67 × 4 =
  7. 7.27 × 8 =
  8. 8.79 × 4 =
  9. 9.16 × 4 =
  10. 10.75 × 8 =
  11. 11.18 × 8 =
  12. 12.28 × 8 =
  13. 13.84 × 4 =
  14. 14.59 × 8 =
  15. 15.22 × 8 =
  16. 16.46 × 8 =
  17. 17.12 × 8 =
  18. 18.72 × 8 =
  19. 19.76 × 4 =
  20. 20.57 × 8 =
  21. 21.70 × 4 =
  22. 22.32 × 8 =
  23. 23.107 × 4 =
  24. 24.108 × 4 =
  25. 25.44 × 8 =
  26. 26.33 × 4 =
  27. 27.52 × 8 =
  28. 28.29 × 8 =
  29. 29.58 × 4 =
  30. 30.41 × 8 =
  31. 31.17 × 4 =
  32. 32.69 × 8 =
  33. 33.148 × 4 =
  34. 34.51 × 8 =
  35. 35.26 × 8 =
  36. 36.40 × 4 =
  37. 37.21 × 8 =
  38. 38.79 × 4 =
  39. 39.54 × 8 =
  40. 40.129 × 4 =

Answer key

  1. 312
  2. 484
  3. 584
  4. 208
  5. 404
  6. 268
  7. 216
  8. 316
  9. 64
  10. 600
  11. 144
  12. 224
  13. 336
  14. 472
  15. 176
  16. 368
  17. 96
  18. 576
  19. 304
  20. 456
  21. 280
  22. 256
  23. 428
  24. 432
  25. 352
  26. 132
  27. 416
  28. 232
  29. 232
  30. 328
  31. 68
  32. 552
  33. 592
  34. 408
  35. 208
  36. 160
  37. 168
  38. 316
  39. 432
  40. 516

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