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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 518 · 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. 1.87 × 4 =
  2. 2.29 × 8 =
  3. 3.28 × 8 =
  4. 4.72 × 4 =
  5. 5.160 × 4 =
  6. 6.73 × 8 =
  7. 7.149 × 4 =
  8. 8.76 × 4 =
  9. 9.53 × 8 =
  10. 10.59 × 4 =
  11. 11.47 × 8 =
  12. 12.153 × 4 =
  13. 13.18 × 8 =
  14. 14.73 × 8 =
  15. 15.136 × 4 =
  16. 16.38 × 8 =
  17. 17.74 × 8 =
  18. 18.23 × 8 =
  19. 19.20 × 4 =
  20. 20.14 × 8 =
  21. 21.44 × 4 =
  22. 22.69 × 8 =
  23. 23.113 × 4 =
  24. 24.140 × 4 =
  25. 25.51 × 8 =
  26. 26.40 × 4 =
  27. 27.23 × 8 =
  28. 28.20 × 8 =
  29. 29.62 × 8 =
  30. 30.17 × 8 =
  31. 31.13 × 8 =
  32. 32.78 × 4 =
  33. 33.24 × 8 =
  34. 34.65 × 8 =
  35. 35.41 × 8 =
  36. 36.63 × 8 =
  37. 37.157 × 4 =
  38. 38.82 × 4 =
  39. 39.75 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 348
  2. 232
  3. 224
  4. 288
  5. 640
  6. 584
  7. 596
  8. 304
  9. 424
  10. 236
  11. 376
  12. 612
  13. 144
  14. 584
  15. 544
  16. 304
  17. 592
  18. 184
  19. 80
  20. 112
  21. 176
  22. 552
  23. 452
  24. 560
  25. 408
  26. 160
  27. 184
  28. 160
  29. 496
  30. 136
  31. 104
  32. 312
  33. 192
  34. 520
  35. 328
  36. 504
  37. 628
  38. 328
  39. 600
  40. 224

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