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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 364 · 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. 1.73 × 4 =
  2. 2.23 × 8 =
  3. 3.69 × 8 =
  4. 4.31 × 8 =
  5. 5.31 × 4 =
  6. 6.46 × 4 =
  7. 7.70 × 4 =
  8. 8.62 × 8 =
  9. 9.66 × 8 =
  10. 10.62 × 8 =
  11. 11.24 × 8 =
  12. 12.50 × 8 =
  13. 13.14 × 8 =
  14. 14.146 × 4 =
  15. 15.69 × 4 =
  16. 16.47 × 4 =
  17. 17.63 × 8 =
  18. 18.18 × 4 =
  19. 19.112 × 4 =
  20. 20.145 × 4 =
  21. 21.46 × 8 =
  22. 22.41 × 8 =
  23. 23.149 × 4 =
  24. 24.71 × 8 =
  25. 25.65 × 8 =
  26. 26.106 × 4 =
  27. 27.80 × 4 =
  28. 28.22 × 4 =
  29. 29.59 × 4 =
  30. 30.77 × 4 =
  31. 31.41 × 8 =
  32. 32.19 × 8 =
  33. 33.14 × 4 =
  34. 34.45 × 4 =
  35. 35.57 × 8 =
  36. 36.29 × 8 =
  37. 37.55 × 8 =
  38. 38.108 × 4 =
  39. 39.14 × 8 =
  40. 40.53 × 4 =

Answer key

  1. 292
  2. 184
  3. 552
  4. 248
  5. 124
  6. 184
  7. 280
  8. 496
  9. 528
  10. 496
  11. 192
  12. 400
  13. 112
  14. 584
  15. 276
  16. 188
  17. 504
  18. 72
  19. 448
  20. 580
  21. 368
  22. 328
  23. 596
  24. 568
  25. 520
  26. 424
  27. 320
  28. 88
  29. 236
  30. 308
  31. 328
  32. 152
  33. 56
  34. 180
  35. 456
  36. 232
  37. 440
  38. 432
  39. 112
  40. 212

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