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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 167 · 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. 1.16 × 8 =
  2. 2.137 × 4 =
  3. 3.68 × 4 =
  4. 4.61 × 8 =
  5. 5.68 × 8 =
  6. 6.72 × 8 =
  7. 7.118 × 4 =
  8. 8.94 × 4 =
  9. 9.74 × 4 =
  10. 10.40 × 8 =
  11. 11.53 × 4 =
  12. 12.64 × 4 =
  13. 13.15 × 8 =
  14. 14.73 × 4 =
  15. 15.113 × 4 =
  16. 16.40 × 4 =
  17. 17.37 × 4 =
  18. 18.90 × 4 =
  19. 19.52 × 8 =
  20. 20.158 × 4 =
  21. 21.68 × 4 =
  22. 22.29 × 4 =
  23. 23.52 × 4 =
  24. 24.57 × 4 =
  25. 25.112 × 4 =
  26. 26.69 × 4 =
  27. 27.16 × 8 =
  28. 28.92 × 4 =
  29. 29.65 × 4 =
  30. 30.44 × 8 =
  31. 31.44 × 4 =
  32. 32.46 × 4 =
  33. 33.74 × 4 =
  34. 34.32 × 8 =
  35. 35.29 × 4 =
  36. 36.66 × 8 =
  37. 37.49 × 8 =
  38. 38.32 × 4 =
  39. 39.148 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 128
  2. 548
  3. 272
  4. 488
  5. 544
  6. 576
  7. 472
  8. 376
  9. 296
  10. 320
  11. 212
  12. 256
  13. 120
  14. 292
  15. 452
  16. 160
  17. 148
  18. 360
  19. 416
  20. 632
  21. 272
  22. 116
  23. 208
  24. 228
  25. 448
  26. 276
  27. 128
  28. 368
  29. 260
  30. 352
  31. 176
  32. 184
  33. 296
  34. 256
  35. 116
  36. 528
  37. 392
  38. 128
  39. 592
  40. 216

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