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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 104 · 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. 1.159 × 4 =
  2. 2.29 × 8 =
  3. 3.63 × 8 =
  4. 4.15 × 4 =
  5. 5.38 × 8 =
  6. 6.47 × 8 =
  7. 7.46 × 8 =
  8. 8.114 × 4 =
  9. 9.58 × 8 =
  10. 10.123 × 4 =
  11. 11.20 × 8 =
  12. 12.106 × 4 =
  13. 13.24 × 8 =
  14. 14.27 × 8 =
  15. 15.50 × 8 =
  16. 16.15 × 4 =
  17. 17.20 × 8 =
  18. 18.63 × 8 =
  19. 19.53 × 4 =
  20. 20.83 × 4 =
  21. 21.52 × 8 =
  22. 22.49 × 8 =
  23. 23.74 × 8 =
  24. 24.18 × 8 =
  25. 25.14 × 8 =
  26. 26.69 × 8 =
  27. 27.22 × 8 =
  28. 28.46 × 8 =
  29. 29.53 × 8 =
  30. 30.56 × 8 =
  31. 31.73 × 8 =
  32. 32.14 × 8 =
  33. 33.74 × 4 =
  34. 34.42 × 8 =
  35. 35.117 × 4 =
  36. 36.145 × 4 =
  37. 37.60 × 4 =
  38. 38.23 × 4 =
  39. 39.39 × 8 =
  40. 40.129 × 4 =

Answer key

  1. 636
  2. 232
  3. 504
  4. 60
  5. 304
  6. 376
  7. 368
  8. 456
  9. 464
  10. 492
  11. 160
  12. 424
  13. 192
  14. 216
  15. 400
  16. 60
  17. 160
  18. 504
  19. 212
  20. 332
  21. 416
  22. 392
  23. 592
  24. 144
  25. 112
  26. 552
  27. 176
  28. 368
  29. 424
  30. 448
  31. 584
  32. 112
  33. 296
  34. 336
  35. 468
  36. 580
  37. 240
  38. 92
  39. 312
  40. 516

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