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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 693 · 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. 1.75 × 4 =
  2. 2.125 × 4 =
  3. 3.158 × 4 =
  4. 4.23 × 4 =
  5. 5.128 × 4 =
  6. 6.123 × 4 =
  7. 7.140 × 4 =
  8. 8.102 × 4 =
  9. 9.125 × 4 =
  10. 10.36 × 8 =
  11. 11.143 × 4 =
  12. 12.32 × 4 =
  13. 13.23 × 4 =
  14. 14.43 × 8 =
  15. 15.46 × 8 =
  16. 16.59 × 8 =
  17. 17.40 × 8 =
  18. 18.13 × 4 =
  19. 19.76 × 4 =
  20. 20.16 × 8 =
  21. 21.41 × 4 =
  22. 22.44 × 8 =
  23. 23.31 × 4 =
  24. 24.55 × 4 =
  25. 25.39 × 4 =
  26. 26.68 × 8 =
  27. 27.14 × 8 =
  28. 28.57 × 8 =
  29. 29.69 × 4 =
  30. 30.122 × 4 =
  31. 31.65 × 8 =
  32. 32.15 × 8 =
  33. 33.69 × 4 =
  34. 34.72 × 4 =
  35. 35.16 × 8 =
  36. 36.159 × 4 =
  37. 37.42 × 8 =
  38. 38.51 × 8 =
  39. 39.27 × 8 =
  40. 40.41 × 8 =

Answer key

  1. 300
  2. 500
  3. 632
  4. 92
  5. 512
  6. 492
  7. 560
  8. 408
  9. 500
  10. 288
  11. 572
  12. 128
  13. 92
  14. 344
  15. 368
  16. 472
  17. 320
  18. 52
  19. 304
  20. 128
  21. 164
  22. 352
  23. 124
  24. 220
  25. 156
  26. 544
  27. 112
  28. 456
  29. 276
  30. 488
  31. 520
  32. 120
  33. 276
  34. 288
  35. 128
  36. 636
  37. 336
  38. 408
  39. 216
  40. 328

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