← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 49 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.13 × 4 =
  2. 2.71 × 4 =
  3. 3.29 × 8 =
  4. 4.40 × 8 =
  5. 5.35 × 4 =
  6. 6.33 × 8 =
  7. 7.37 × 8 =
  8. 8.16 × 4 =
  9. 9.12 × 8 =
  10. 10.13 × 8 =
  11. 11.45 × 4 =
  12. 12.54 × 4 =
  13. 13.30 × 8 =
  14. 14.64 × 4 =
  15. 15.14 × 4 =
  16. 16.21 × 4 =
  17. 17.20 × 4 =
  18. 18.44 × 4 =
  19. 19.33 × 4 =
  20. 20.15 × 4 =
  21. 21.47 × 4 =
  22. 22.74 × 4 =
  23. 23.23 × 4 =
  24. 24.19 × 8 =
  25. 25.16 × 8 =
  26. 26.20 × 8 =
  27. 27.17 × 8 =
  28. 28.24 × 4 =
  29. 29.36 × 8 =
  30. 30.31 × 8 =
  31. 31.34 × 4 =
  32. 32.39 × 8 =
  33. 33.50 × 4 =
  34. 34.26 × 8 =
  35. 35.51 × 4 =
  36. 36.22 × 8 =
  37. 37.30 × 4 =
  38. 38.18 × 4 =
  39. 39.38 × 4 =
  40. 40.48 × 4 =

Answer key

  1. 52
  2. 284
  3. 232
  4. 320
  5. 140
  6. 264
  7. 296
  8. 64
  9. 96
  10. 104
  11. 180
  12. 216
  13. 240
  14. 256
  15. 56
  16. 84
  17. 80
  18. 176
  19. 132
  20. 60
  21. 188
  22. 296
  23. 92
  24. 152
  25. 128
  26. 160
  27. 136
  28. 96
  29. 288
  30. 248
  31. 136
  32. 312
  33. 200
  34. 208
  35. 204
  36. 176
  37. 120
  38. 72
  39. 152
  40. 192

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