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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 692 · 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 × 4 =
  2. 2.31 × 8 =
  3. 3.41 × 8 =
  4. 4.28 × 8 =
  5. 5.140 × 4 =
  6. 6.51 × 8 =
  7. 7.70 × 8 =
  8. 8.37 × 8 =
  9. 9.69 × 4 =
  10. 10.137 × 4 =
  11. 11.66 × 8 =
  12. 12.124 × 4 =
  13. 13.53 × 8 =
  14. 14.26 × 8 =
  15. 15.22 × 4 =
  16. 16.116 × 4 =
  17. 17.37 × 4 =
  18. 18.98 × 4 =
  19. 19.138 × 4 =
  20. 20.103 × 4 =
  21. 21.85 × 4 =
  22. 22.38 × 8 =
  23. 23.146 × 4 =
  24. 24.60 × 4 =
  25. 25.62 × 8 =
  26. 26.68 × 8 =
  27. 27.149 × 4 =
  28. 28.40 × 4 =
  29. 29.28 × 4 =
  30. 30.131 × 4 =
  31. 31.63 × 4 =
  32. 32.134 × 4 =
  33. 33.18 × 4 =
  34. 34.56 × 4 =
  35. 35.32 × 4 =
  36. 36.64 × 4 =
  37. 37.116 × 4 =
  38. 38.105 × 4 =
  39. 39.20 × 8 =
  40. 40.64 × 8 =

Answer key

  1. 228
  2. 248
  3. 328
  4. 224
  5. 560
  6. 408
  7. 560
  8. 296
  9. 276
  10. 548
  11. 528
  12. 496
  13. 424
  14. 208
  15. 88
  16. 464
  17. 148
  18. 392
  19. 552
  20. 412
  21. 340
  22. 304
  23. 584
  24. 240
  25. 496
  26. 544
  27. 596
  28. 160
  29. 112
  30. 524
  31. 252
  32. 536
  33. 72
  34. 224
  35. 128
  36. 256
  37. 464
  38. 420
  39. 160
  40. 512

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