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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 658 · 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. 1.70 × 4 =
  2. 2.85 × 4 =
  3. 3.57 × 4 =
  4. 4.15 × 8 =
  5. 5.71 × 8 =
  6. 6.111 × 4 =
  7. 7.117 × 4 =
  8. 8.29 × 4 =
  9. 9.135 × 4 =
  10. 10.46 × 8 =
  11. 11.100 × 4 =
  12. 12.45 × 8 =
  13. 13.60 × 4 =
  14. 14.61 × 8 =
  15. 15.73 × 8 =
  16. 16.21 × 4 =
  17. 17.78 × 4 =
  18. 18.91 × 4 =
  19. 19.28 × 4 =
  20. 20.29 × 8 =
  21. 21.41 × 8 =
  22. 22.14 × 8 =
  23. 23.29 × 4 =
  24. 24.144 × 4 =
  25. 25.107 × 4 =
  26. 26.47 × 8 =
  27. 27.13 × 8 =
  28. 28.61 × 8 =
  29. 29.65 × 8 =
  30. 30.137 × 4 =
  31. 31.30 × 4 =
  32. 32.17 × 8 =
  33. 33.56 × 8 =
  34. 34.90 × 4 =
  35. 35.35 × 4 =
  36. 36.68 × 8 =
  37. 37.22 × 8 =
  38. 38.75 × 8 =
  39. 39.71 × 8 =
  40. 40.56 × 8 =

Answer key

  1. 280
  2. 340
  3. 228
  4. 120
  5. 568
  6. 444
  7. 468
  8. 116
  9. 540
  10. 368
  11. 400
  12. 360
  13. 240
  14. 488
  15. 584
  16. 84
  17. 312
  18. 364
  19. 112
  20. 232
  21. 328
  22. 112
  23. 116
  24. 576
  25. 428
  26. 376
  27. 104
  28. 488
  29. 520
  30. 548
  31. 120
  32. 136
  33. 448
  34. 360
  35. 140
  36. 544
  37. 176
  38. 600
  39. 568
  40. 448

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