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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 849 · 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. 1.23 × 4 =
  2. 2.56 × 4 =
  3. 3.44 × 4 =
  4. 4.20 × 8 =
  5. 5.32 × 8 =
  6. 6.149 × 4 =
  7. 7.48 × 4 =
  8. 8.73 × 8 =
  9. 9.136 × 4 =
  10. 10.152 × 4 =
  11. 11.109 × 4 =
  12. 12.47 × 8 =
  13. 13.29 × 8 =
  14. 14.13 × 4 =
  15. 15.46 × 8 =
  16. 16.60 × 8 =
  17. 17.114 × 4 =
  18. 18.62 × 4 =
  19. 19.121 × 4 =
  20. 20.143 × 4 =
  21. 21.123 × 4 =
  22. 22.101 × 4 =
  23. 23.34 × 8 =
  24. 24.88 × 4 =
  25. 25.31 × 4 =
  26. 26.22 × 4 =
  27. 27.154 × 4 =
  28. 28.60 × 8 =
  29. 29.58 × 4 =
  30. 30.120 × 4 =
  31. 31.144 × 4 =
  32. 32.62 × 4 =
  33. 33.150 × 4 =
  34. 34.140 × 4 =
  35. 35.68 × 8 =
  36. 36.41 × 4 =
  37. 37.58 × 8 =
  38. 38.151 × 4 =
  39. 39.41 × 4 =
  40. 40.103 × 4 =

Answer key

  1. 92
  2. 224
  3. 176
  4. 160
  5. 256
  6. 596
  7. 192
  8. 584
  9. 544
  10. 608
  11. 436
  12. 376
  13. 232
  14. 52
  15. 368
  16. 480
  17. 456
  18. 248
  19. 484
  20. 572
  21. 492
  22. 404
  23. 272
  24. 352
  25. 124
  26. 88
  27. 616
  28. 480
  29. 232
  30. 480
  31. 576
  32. 248
  33. 600
  34. 560
  35. 544
  36. 164
  37. 464
  38. 604
  39. 164
  40. 412

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