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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 203 · 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. 1.159 × 4 =
  2. 2.23 × 8 =
  3. 3.115 × 4 =
  4. 4.74 × 4 =
  5. 5.92 × 4 =
  6. 6.100 × 4 =
  7. 7.59 × 8 =
  8. 8.35 × 8 =
  9. 9.102 × 4 =
  10. 10.47 × 4 =
  11. 11.76 × 4 =
  12. 12.12 × 8 =
  13. 13.58 × 8 =
  14. 14.16 × 4 =
  15. 15.54 × 8 =
  16. 16.111 × 4 =
  17. 17.149 × 4 =
  18. 18.148 × 4 =
  19. 19.19 × 4 =
  20. 20.123 × 4 =
  21. 21.61 × 8 =
  22. 22.95 × 4 =
  23. 23.41 × 8 =
  24. 24.20 × 8 =
  25. 25.47 × 8 =
  26. 26.37 × 8 =
  27. 27.16 × 8 =
  28. 28.112 × 4 =
  29. 29.93 × 4 =
  30. 30.50 × 8 =
  31. 31.74 × 4 =
  32. 32.34 × 8 =
  33. 33.26 × 8 =
  34. 34.29 × 4 =
  35. 35.42 × 8 =
  36. 36.17 × 4 =
  37. 37.145 × 4 =
  38. 38.91 × 4 =
  39. 39.72 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 636
  2. 184
  3. 460
  4. 296
  5. 368
  6. 400
  7. 472
  8. 280
  9. 408
  10. 188
  11. 304
  12. 96
  13. 464
  14. 64
  15. 432
  16. 444
  17. 596
  18. 592
  19. 76
  20. 492
  21. 488
  22. 380
  23. 328
  24. 160
  25. 376
  26. 296
  27. 128
  28. 448
  29. 372
  30. 400
  31. 296
  32. 272
  33. 208
  34. 116
  35. 336
  36. 68
  37. 580
  38. 364
  39. 576
  40. 104

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