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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 202 · 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. 1.158 × 4 =
  2. 2.101 × 4 =
  3. 3.62 × 8 =
  4. 4.21 × 8 =
  5. 5.56 × 4 =
  6. 6.13 × 8 =
  7. 7.66 × 8 =
  8. 8.62 × 8 =
  9. 9.77 × 4 =
  10. 10.52 × 8 =
  11. 11.25 × 8 =
  12. 12.141 × 4 =
  13. 13.53 × 8 =
  14. 14.95 × 4 =
  15. 15.67 × 8 =
  16. 16.23 × 8 =
  17. 17.29 × 8 =
  18. 18.46 × 8 =
  19. 19.49 × 4 =
  20. 20.150 × 4 =
  21. 21.37 × 8 =
  22. 22.19 × 8 =
  23. 23.44 × 4 =
  24. 24.124 × 4 =
  25. 25.62 × 4 =
  26. 26.17 × 4 =
  27. 27.17 × 8 =
  28. 28.38 × 4 =
  29. 29.13 × 8 =
  30. 30.41 × 4 =
  31. 31.95 × 4 =
  32. 32.28 × 8 =
  33. 33.130 × 4 =
  34. 34.111 × 4 =
  35. 35.46 × 8 =
  36. 36.14 × 8 =
  37. 37.69 × 8 =
  38. 38.148 × 4 =
  39. 39.47 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 632
  2. 404
  3. 496
  4. 168
  5. 224
  6. 104
  7. 528
  8. 496
  9. 308
  10. 416
  11. 200
  12. 564
  13. 424
  14. 380
  15. 536
  16. 184
  17. 232
  18. 368
  19. 196
  20. 600
  21. 296
  22. 152
  23. 176
  24. 496
  25. 248
  26. 68
  27. 136
  28. 152
  29. 104
  30. 164
  31. 380
  32. 224
  33. 520
  34. 444
  35. 368
  36. 112
  37. 552
  38. 592
  39. 376
  40. 152

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