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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 465 · 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. 1.72 × 4 =
  2. 2.56 × 8 =
  3. 3.23 × 8 =
  4. 4.72 × 8 =
  5. 5.156 × 4 =
  6. 6.104 × 4 =
  7. 7.14 × 8 =
  8. 8.57 × 8 =
  9. 9.47 × 8 =
  10. 10.67 × 8 =
  11. 11.54 × 4 =
  12. 12.35 × 8 =
  13. 13.55 × 8 =
  14. 14.138 × 4 =
  15. 15.30 × 8 =
  16. 16.110 × 4 =
  17. 17.69 × 4 =
  18. 18.27 × 8 =
  19. 19.35 × 8 =
  20. 20.82 × 4 =
  21. 21.15 × 4 =
  22. 22.127 × 4 =
  23. 23.122 × 4 =
  24. 24.32 × 4 =
  25. 25.36 × 4 =
  26. 26.21 × 4 =
  27. 27.30 × 8 =
  28. 28.42 × 4 =
  29. 29.30 × 8 =
  30. 30.138 × 4 =
  31. 31.137 × 4 =
  32. 32.144 × 4 =
  33. 33.30 × 4 =
  34. 34.59 × 8 =
  35. 35.14 × 8 =
  36. 36.118 × 4 =
  37. 37.47 × 4 =
  38. 38.95 × 4 =
  39. 39.146 × 4 =
  40. 40.83 × 4 =

Answer key

  1. 288
  2. 448
  3. 184
  4. 576
  5. 624
  6. 416
  7. 112
  8. 456
  9. 376
  10. 536
  11. 216
  12. 280
  13. 440
  14. 552
  15. 240
  16. 440
  17. 276
  18. 216
  19. 280
  20. 328
  21. 60
  22. 508
  23. 488
  24. 128
  25. 144
  26. 84
  27. 240
  28. 168
  29. 240
  30. 552
  31. 548
  32. 576
  33. 120
  34. 472
  35. 112
  36. 472
  37. 188
  38. 380
  39. 584
  40. 332

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