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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 695 · 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. 1.157 × 4 =
  2. 2.101 × 4 =
  3. 3.106 × 4 =
  4. 4.154 × 4 =
  5. 5.152 × 4 =
  6. 6.22 × 8 =
  7. 7.44 × 8 =
  8. 8.153 × 4 =
  9. 9.24 × 4 =
  10. 10.92 × 4 =
  11. 11.132 × 4 =
  12. 12.54 × 4 =
  13. 13.79 × 4 =
  14. 14.14 × 8 =
  15. 15.83 × 4 =
  16. 16.34 × 8 =
  17. 17.68 × 8 =
  18. 18.114 × 4 =
  19. 19.28 × 4 =
  20. 20.17 × 8 =
  21. 21.36 × 8 =
  22. 22.31 × 4 =
  23. 23.58 × 4 =
  24. 24.150 × 4 =
  25. 25.109 × 4 =
  26. 26.55 × 4 =
  27. 27.25 × 8 =
  28. 28.62 × 8 =
  29. 29.67 × 8 =
  30. 30.69 × 4 =
  31. 31.33 × 8 =
  32. 32.95 × 4 =
  33. 33.52 × 8 =
  34. 34.18 × 4 =
  35. 35.57 × 8 =
  36. 36.44 × 8 =
  37. 37.29 × 8 =
  38. 38.118 × 4 =
  39. 39.100 × 4 =
  40. 40.101 × 4 =

Answer key

  1. 628
  2. 404
  3. 424
  4. 616
  5. 608
  6. 176
  7. 352
  8. 612
  9. 96
  10. 368
  11. 528
  12. 216
  13. 316
  14. 112
  15. 332
  16. 272
  17. 544
  18. 456
  19. 112
  20. 136
  21. 288
  22. 124
  23. 232
  24. 600
  25. 436
  26. 220
  27. 200
  28. 496
  29. 536
  30. 276
  31. 264
  32. 380
  33. 416
  34. 72
  35. 456
  36. 352
  37. 232
  38. 472
  39. 400
  40. 404

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