← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 732 · 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. 1.94 × 4 =
  2. 2.56 × 8 =
  3. 3.118 × 4 =
  4. 4.69 × 8 =
  5. 5.114 × 4 =
  6. 6.68 × 8 =
  7. 7.63 × 8 =
  8. 8.91 × 4 =
  9. 9.37 × 4 =
  10. 10.28 × 8 =
  11. 11.69 × 8 =
  12. 12.146 × 4 =
  13. 13.57 × 8 =
  14. 14.27 × 4 =
  15. 15.39 × 4 =
  16. 16.13 × 8 =
  17. 17.17 × 4 =
  18. 18.112 × 4 =
  19. 19.40 × 4 =
  20. 20.48 × 8 =
  21. 21.59 × 4 =
  22. 22.17 × 8 =
  23. 23.29 × 8 =
  24. 24.19 × 4 =
  25. 25.117 × 4 =
  26. 26.16 × 8 =
  27. 27.56 × 8 =
  28. 28.51 × 8 =
  29. 29.28 × 4 =
  30. 30.20 × 8 =
  31. 31.38 × 4 =
  32. 32.127 × 4 =
  33. 33.85 × 4 =
  34. 34.42 × 8 =
  35. 35.20 × 8 =
  36. 36.42 × 8 =
  37. 37.77 × 4 =
  38. 38.52 × 8 =
  39. 39.20 × 8 =
  40. 40.74 × 8 =

Answer key

  1. 376
  2. 448
  3. 472
  4. 552
  5. 456
  6. 544
  7. 504
  8. 364
  9. 148
  10. 224
  11. 552
  12. 584
  13. 456
  14. 108
  15. 156
  16. 104
  17. 68
  18. 448
  19. 160
  20. 384
  21. 236
  22. 136
  23. 232
  24. 76
  25. 468
  26. 128
  27. 448
  28. 408
  29. 112
  30. 160
  31. 152
  32. 508
  33. 340
  34. 336
  35. 160
  36. 336
  37. 308
  38. 416
  39. 160
  40. 592

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths