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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 276 · 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. 1.67 × 8 =
  2. 2.21 × 8 =
  3. 3.140 × 4 =
  4. 4.68 × 8 =
  5. 5.88 × 4 =
  6. 6.54 × 8 =
  7. 7.19 × 8 =
  8. 8.25 × 8 =
  9. 9.46 × 4 =
  10. 10.129 × 4 =
  11. 11.59 × 4 =
  12. 12.101 × 4 =
  13. 13.60 × 8 =
  14. 14.28 × 8 =
  15. 15.67 × 8 =
  16. 16.139 × 4 =
  17. 17.32 × 8 =
  18. 18.16 × 8 =
  19. 19.47 × 4 =
  20. 20.100 × 4 =
  21. 21.46 × 4 =
  22. 22.118 × 4 =
  23. 23.55 × 8 =
  24. 24.82 × 4 =
  25. 25.62 × 8 =
  26. 26.50 × 8 =
  27. 27.45 × 8 =
  28. 28.41 × 8 =
  29. 29.39 × 8 =
  30. 30.154 × 4 =
  31. 31.95 × 4 =
  32. 32.56 × 8 =
  33. 33.139 × 4 =
  34. 34.33 × 8 =
  35. 35.89 × 4 =
  36. 36.24 × 4 =
  37. 37.63 × 8 =
  38. 38.23 × 8 =
  39. 39.59 × 8 =
  40. 40.72 × 8 =

Answer key

  1. 536
  2. 168
  3. 560
  4. 544
  5. 352
  6. 432
  7. 152
  8. 200
  9. 184
  10. 516
  11. 236
  12. 404
  13. 480
  14. 224
  15. 536
  16. 556
  17. 256
  18. 128
  19. 188
  20. 400
  21. 184
  22. 472
  23. 440
  24. 328
  25. 496
  26. 400
  27. 360
  28. 328
  29. 312
  30. 616
  31. 380
  32. 448
  33. 556
  34. 264
  35. 356
  36. 96
  37. 504
  38. 184
  39. 472
  40. 576

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