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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 114 · 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. 1.15 × 8 =
  2. 2.54 × 8 =
  3. 3.46 × 8 =
  4. 4.22 × 8 =
  5. 5.47 × 4 =
  6. 6.148 × 4 =
  7. 7.47 × 8 =
  8. 8.152 × 4 =
  9. 9.43 × 8 =
  10. 10.128 × 4 =
  11. 11.67 × 4 =
  12. 12.34 × 8 =
  13. 13.68 × 8 =
  14. 14.49 × 4 =
  15. 15.74 × 8 =
  16. 16.100 × 4 =
  17. 17.15 × 8 =
  18. 18.62 × 8 =
  19. 19.90 × 4 =
  20. 20.28 × 4 =
  21. 21.22 × 8 =
  22. 22.50 × 8 =
  23. 23.152 × 4 =
  24. 24.21 × 8 =
  25. 25.77 × 4 =
  26. 26.68 × 8 =
  27. 27.145 × 4 =
  28. 28.25 × 8 =
  29. 29.146 × 4 =
  30. 30.15 × 8 =
  31. 31.86 × 4 =
  32. 32.53 × 8 =
  33. 33.32 × 4 =
  34. 34.140 × 4 =
  35. 35.116 × 4 =
  36. 36.20 × 8 =
  37. 37.154 × 4 =
  38. 38.58 × 4 =
  39. 39.98 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 120
  2. 432
  3. 368
  4. 176
  5. 188
  6. 592
  7. 376
  8. 608
  9. 344
  10. 512
  11. 268
  12. 272
  13. 544
  14. 196
  15. 592
  16. 400
  17. 120
  18. 496
  19. 360
  20. 112
  21. 176
  22. 400
  23. 608
  24. 168
  25. 308
  26. 544
  27. 580
  28. 200
  29. 584
  30. 120
  31. 344
  32. 424
  33. 128
  34. 560
  35. 464
  36. 160
  37. 616
  38. 232
  39. 392
  40. 60

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