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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 557 · 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. 1.124 × 4 =
  2. 2.158 × 4 =
  3. 3.32 × 8 =
  4. 4.117 × 4 =
  5. 5.14 × 8 =
  6. 6.28 × 8 =
  7. 7.45 × 8 =
  8. 8.105 × 4 =
  9. 9.71 × 4 =
  10. 10.91 × 4 =
  11. 11.14 × 8 =
  12. 12.27 × 8 =
  13. 13.73 × 8 =
  14. 14.133 × 4 =
  15. 15.72 × 8 =
  16. 16.43 × 4 =
  17. 17.122 × 4 =
  18. 18.19 × 8 =
  19. 19.51 × 8 =
  20. 20.23 × 4 =
  21. 21.118 × 4 =
  22. 22.19 × 4 =
  23. 23.41 × 8 =
  24. 24.55 × 4 =
  25. 25.30 × 8 =
  26. 26.50 × 8 =
  27. 27.40 × 8 =
  28. 28.63 × 8 =
  29. 29.44 × 4 =
  30. 30.120 × 4 =
  31. 31.65 × 8 =
  32. 32.23 × 4 =
  33. 33.63 × 8 =
  34. 34.36 × 8 =
  35. 35.59 × 8 =
  36. 36.23 × 8 =
  37. 37.24 × 8 =
  38. 38.55 × 4 =
  39. 39.74 × 4 =
  40. 40.137 × 4 =

Answer key

  1. 496
  2. 632
  3. 256
  4. 468
  5. 112
  6. 224
  7. 360
  8. 420
  9. 284
  10. 364
  11. 112
  12. 216
  13. 584
  14. 532
  15. 576
  16. 172
  17. 488
  18. 152
  19. 408
  20. 92
  21. 472
  22. 76
  23. 328
  24. 220
  25. 240
  26. 400
  27. 320
  28. 504
  29. 176
  30. 480
  31. 520
  32. 92
  33. 504
  34. 288
  35. 472
  36. 184
  37. 192
  38. 220
  39. 296
  40. 548

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