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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 83 · 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. 1.61 × 4 =
  2. 2.39 × 8 =
  3. 3.27 × 8 =
  4. 4.139 × 4 =
  5. 5.111 × 4 =
  6. 6.36 × 8 =
  7. 7.29 × 4 =
  8. 8.159 × 4 =
  9. 9.61 × 4 =
  10. 10.23 × 8 =
  11. 11.66 × 8 =
  12. 12.32 × 8 =
  13. 13.57 × 8 =
  14. 14.31 × 8 =
  15. 15.158 × 4 =
  16. 16.74 × 4 =
  17. 17.100 × 4 =
  18. 18.24 × 4 =
  19. 19.50 × 8 =
  20. 20.139 × 4 =
  21. 21.61 × 8 =
  22. 22.149 × 4 =
  23. 23.59 × 8 =
  24. 24.92 × 4 =
  25. 25.36 × 8 =
  26. 26.23 × 8 =
  27. 27.30 × 8 =
  28. 28.29 × 8 =
  29. 29.70 × 8 =
  30. 30.34 × 4 =
  31. 31.136 × 4 =
  32. 32.88 × 4 =
  33. 33.55 × 4 =
  34. 34.130 × 4 =
  35. 35.84 × 4 =
  36. 36.18 × 4 =
  37. 37.46 × 4 =
  38. 38.107 × 4 =
  39. 39.33 × 8 =
  40. 40.22 × 8 =

Answer key

  1. 244
  2. 312
  3. 216
  4. 556
  5. 444
  6. 288
  7. 116
  8. 636
  9. 244
  10. 184
  11. 528
  12. 256
  13. 456
  14. 248
  15. 632
  16. 296
  17. 400
  18. 96
  19. 400
  20. 556
  21. 488
  22. 596
  23. 472
  24. 368
  25. 288
  26. 184
  27. 240
  28. 232
  29. 560
  30. 136
  31. 544
  32. 352
  33. 220
  34. 520
  35. 336
  36. 72
  37. 184
  38. 428
  39. 264
  40. 176

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