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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 758 · 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. 1.52 × 8 =
  2. 2.47 × 4 =
  3. 3.29 × 8 =
  4. 4.118 × 4 =
  5. 5.152 × 4 =
  6. 6.30 × 4 =
  7. 7.40 × 4 =
  8. 8.16 × 4 =
  9. 9.19 × 8 =
  10. 10.50 × 8 =
  11. 11.143 × 4 =
  12. 12.69 × 8 =
  13. 13.42 × 8 =
  14. 14.99 × 4 =
  15. 15.79 × 4 =
  16. 16.68 × 8 =
  17. 17.23 × 8 =
  18. 18.93 × 4 =
  19. 19.54 × 4 =
  20. 20.89 × 4 =
  21. 21.99 × 4 =
  22. 22.37 × 8 =
  23. 23.130 × 4 =
  24. 24.35 × 8 =
  25. 25.48 × 4 =
  26. 26.26 × 8 =
  27. 27.12 × 8 =
  28. 28.158 × 4 =
  29. 29.98 × 4 =
  30. 30.99 × 4 =
  31. 31.26 × 8 =
  32. 32.56 × 8 =
  33. 33.44 × 4 =
  34. 34.53 × 8 =
  35. 35.129 × 4 =
  36. 36.45 × 4 =
  37. 37.31 × 8 =
  38. 38.50 × 4 =
  39. 39.71 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 416
  2. 188
  3. 232
  4. 472
  5. 608
  6. 120
  7. 160
  8. 64
  9. 152
  10. 400
  11. 572
  12. 552
  13. 336
  14. 396
  15. 316
  16. 544
  17. 184
  18. 372
  19. 216
  20. 356
  21. 396
  22. 296
  23. 520
  24. 280
  25. 192
  26. 208
  27. 96
  28. 632
  29. 392
  30. 396
  31. 208
  32. 448
  33. 176
  34. 424
  35. 516
  36. 180
  37. 248
  38. 200
  39. 284
  40. 200

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