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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 97 · 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. 1.16 × 8 =
  2. 2.87 × 4 =
  3. 3.104 × 4 =
  4. 4.75 × 8 =
  5. 5.46 × 8 =
  6. 6.27 × 4 =
  7. 7.38 × 4 =
  8. 8.29 × 8 =
  9. 9.50 × 8 =
  10. 10.123 × 4 =
  11. 11.53 × 8 =
  12. 12.36 × 8 =
  13. 13.67 × 4 =
  14. 14.23 × 8 =
  15. 15.65 × 8 =
  16. 16.98 × 4 =
  17. 17.33 × 8 =
  18. 18.51 × 8 =
  19. 19.82 × 4 =
  20. 20.28 × 8 =
  21. 21.46 × 4 =
  22. 22.51 × 4 =
  23. 23.44 × 8 =
  24. 24.23 × 4 =
  25. 25.110 × 4 =
  26. 26.32 × 8 =
  27. 27.69 × 4 =
  28. 28.13 × 8 =
  29. 29.29 × 4 =
  30. 30.138 × 4 =
  31. 31.39 × 8 =
  32. 32.91 × 4 =
  33. 33.53 × 4 =
  34. 34.46 × 8 =
  35. 35.93 × 4 =
  36. 36.136 × 4 =
  37. 37.69 × 8 =
  38. 38.40 × 4 =
  39. 39.105 × 4 =
  40. 40.82 × 4 =

Answer key

  1. 128
  2. 348
  3. 416
  4. 600
  5. 368
  6. 108
  7. 152
  8. 232
  9. 400
  10. 492
  11. 424
  12. 288
  13. 268
  14. 184
  15. 520
  16. 392
  17. 264
  18. 408
  19. 328
  20. 224
  21. 184
  22. 204
  23. 352
  24. 92
  25. 440
  26. 256
  27. 276
  28. 104
  29. 116
  30. 552
  31. 312
  32. 364
  33. 212
  34. 368
  35. 372
  36. 544
  37. 552
  38. 160
  39. 420
  40. 328

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