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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 102 · 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. 2.41 × 8 =
  3. 3.110 × 4 =
  4. 4.151 × 4 =
  5. 5.47 × 4 =
  6. 6.41 × 4 =
  7. 7.35 × 8 =
  8. 8.102 × 4 =
  9. 9.14 × 4 =
  10. 10.48 × 8 =
  11. 11.61 × 8 =
  12. 12.141 × 4 =
  13. 13.56 × 4 =
  14. 14.37 × 8 =
  15. 15.146 × 4 =
  16. 16.73 × 8 =
  17. 17.67 × 4 =
  18. 18.114 × 4 =
  19. 19.97 × 4 =
  20. 20.107 × 4 =
  21. 21.85 × 4 =
  22. 22.40 × 4 =
  23. 23.45 × 8 =
  24. 24.58 × 8 =
  25. 25.26 × 4 =
  26. 26.139 × 4 =
  27. 27.139 × 4 =
  28. 28.68 × 4 =
  29. 29.56 × 4 =
  30. 30.44 × 4 =
  31. 31.95 × 4 =
  32. 32.78 × 4 =
  33. 33.13 × 8 =
  34. 34.44 × 8 =
  35. 35.142 × 4 =
  36. 36.28 × 8 =
  37. 37.26 × 4 =
  38. 38.54 × 4 =
  39. 39.99 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 632
  2. 328
  3. 440
  4. 604
  5. 188
  6. 164
  7. 280
  8. 408
  9. 56
  10. 384
  11. 488
  12. 564
  13. 224
  14. 296
  15. 584
  16. 584
  17. 268
  18. 456
  19. 388
  20. 428
  21. 340
  22. 160
  23. 360
  24. 464
  25. 104
  26. 556
  27. 556
  28. 272
  29. 224
  30. 176
  31. 380
  32. 312
  33. 104
  34. 352
  35. 568
  36. 224
  37. 104
  38. 216
  39. 396
  40. 168

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