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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 485 · 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. 1.114 × 4 =
  2. 2.53 × 4 =
  3. 3.100 × 4 =
  4. 4.16 × 8 =
  5. 5.88 × 4 =
  6. 6.62 × 8 =
  7. 7.41 × 8 =
  8. 8.72 × 4 =
  9. 9.145 × 4 =
  10. 10.71 × 4 =
  11. 11.160 × 4 =
  12. 12.33 × 8 =
  13. 13.75 × 8 =
  14. 14.137 × 4 =
  15. 15.45 × 8 =
  16. 16.72 × 4 =
  17. 17.73 × 8 =
  18. 18.90 × 4 =
  19. 19.61 × 4 =
  20. 20.50 × 8 =
  21. 21.149 × 4 =
  22. 22.65 × 4 =
  23. 23.55 × 8 =
  24. 24.20 × 8 =
  25. 25.52 × 8 =
  26. 26.49 × 4 =
  27. 27.67 × 4 =
  28. 28.47 × 4 =
  29. 29.42 × 4 =
  30. 30.52 × 8 =
  31. 31.36 × 4 =
  32. 32.62 × 8 =
  33. 33.33 × 4 =
  34. 34.127 × 4 =
  35. 35.86 × 4 =
  36. 36.130 × 4 =
  37. 37.90 × 4 =
  38. 38.43 × 8 =
  39. 39.58 × 4 =
  40. 40.74 × 8 =

Answer key

  1. 456
  2. 212
  3. 400
  4. 128
  5. 352
  6. 496
  7. 328
  8. 288
  9. 580
  10. 284
  11. 640
  12. 264
  13. 600
  14. 548
  15. 360
  16. 288
  17. 584
  18. 360
  19. 244
  20. 400
  21. 596
  22. 260
  23. 440
  24. 160
  25. 416
  26. 196
  27. 268
  28. 188
  29. 168
  30. 416
  31. 144
  32. 496
  33. 132
  34. 508
  35. 344
  36. 520
  37. 360
  38. 344
  39. 232
  40. 592

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