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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 842 · 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. 1.57 × 8 =
  2. 2.61 × 4 =
  3. 3.19 × 4 =
  4. 4.21 × 8 =
  5. 5.13 × 8 =
  6. 6.55 × 8 =
  7. 7.127 × 4 =
  8. 8.69 × 8 =
  9. 9.53 × 8 =
  10. 10.22 × 4 =
  11. 11.117 × 4 =
  12. 12.105 × 4 =
  13. 13.33 × 8 =
  14. 14.49 × 8 =
  15. 15.54 × 8 =
  16. 16.18 × 4 =
  17. 17.105 × 4 =
  18. 18.36 × 8 =
  19. 19.21 × 8 =
  20. 20.56 × 4 =
  21. 21.24 × 8 =
  22. 22.146 × 4 =
  23. 23.43 × 8 =
  24. 24.119 × 4 =
  25. 25.149 × 4 =
  26. 26.72 × 8 =
  27. 27.34 × 8 =
  28. 28.65 × 8 =
  29. 29.133 × 4 =
  30. 30.30 × 8 =
  31. 31.75 × 4 =
  32. 32.66 × 8 =
  33. 33.122 × 4 =
  34. 34.139 × 4 =
  35. 35.153 × 4 =
  36. 36.68 × 8 =
  37. 37.133 × 4 =
  38. 38.13 × 4 =
  39. 39.61 × 8 =
  40. 40.52 × 8 =

Answer key

  1. 456
  2. 244
  3. 76
  4. 168
  5. 104
  6. 440
  7. 508
  8. 552
  9. 424
  10. 88
  11. 468
  12. 420
  13. 264
  14. 392
  15. 432
  16. 72
  17. 420
  18. 288
  19. 168
  20. 224
  21. 192
  22. 584
  23. 344
  24. 476
  25. 596
  26. 576
  27. 272
  28. 520
  29. 532
  30. 240
  31. 300
  32. 528
  33. 488
  34. 556
  35. 612
  36. 544
  37. 532
  38. 52
  39. 488
  40. 416

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