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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 592 · 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. 1.149 × 4 =
  2. 2.40 × 8 =
  3. 3.71 × 4 =
  4. 4.28 × 8 =
  5. 5.29 × 8 =
  6. 6.33 × 8 =
  7. 7.111 × 4 =
  8. 8.47 × 8 =
  9. 9.106 × 4 =
  10. 10.32 × 4 =
  11. 11.104 × 4 =
  12. 12.43 × 8 =
  13. 13.20 × 8 =
  14. 14.114 × 4 =
  15. 15.52 × 8 =
  16. 16.33 × 4 =
  17. 17.35 × 4 =
  18. 18.23 × 4 =
  19. 19.41 × 4 =
  20. 20.33 × 4 =
  21. 21.53 × 4 =
  22. 22.146 × 4 =
  23. 23.28 × 4 =
  24. 24.75 × 4 =
  25. 25.65 × 8 =
  26. 26.22 × 8 =
  27. 27.126 × 4 =
  28. 28.52 × 8 =
  29. 29.122 × 4 =
  30. 30.55 × 8 =
  31. 31.54 × 8 =
  32. 32.135 × 4 =
  33. 33.31 × 8 =
  34. 34.49 × 4 =
  35. 35.59 × 8 =
  36. 36.23 × 8 =
  37. 37.29 × 4 =
  38. 38.37 × 8 =
  39. 39.106 × 4 =
  40. 40.36 × 4 =

Answer key

  1. 596
  2. 320
  3. 284
  4. 224
  5. 232
  6. 264
  7. 444
  8. 376
  9. 424
  10. 128
  11. 416
  12. 344
  13. 160
  14. 456
  15. 416
  16. 132
  17. 140
  18. 92
  19. 164
  20. 132
  21. 212
  22. 584
  23. 112
  24. 300
  25. 520
  26. 176
  27. 504
  28. 416
  29. 488
  30. 440
  31. 432
  32. 540
  33. 248
  34. 196
  35. 472
  36. 184
  37. 116
  38. 296
  39. 424
  40. 144

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