← 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 339 · 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. 1.36 × 8 =
  2. 2.12 × 8 =
  3. 3.71 × 4 =
  4. 4.51 × 4 =
  5. 5.40 × 8 =
  6. 6.19 × 4 =
  7. 7.38 × 4 =
  8. 8.28 × 8 =
  9. 9.26 × 8 =
  10. 10.20 × 8 =
  11. 11.72 × 4 =
  12. 12.75 × 4 =
  13. 13.17 × 8 =
  14. 14.66 × 4 =
  15. 15.48 × 4 =
  16. 16.14 × 8 =
  17. 17.36 × 4 =
  18. 18.32 × 4 =
  19. 19.31 × 8 =
  20. 20.69 × 4 =
  21. 21.68 × 4 =
  22. 22.34 × 8 =
  23. 23.58 × 4 =
  24. 24.63 × 4 =
  25. 25.15 × 4 =
  26. 26.74 × 4 =
  27. 27.45 × 4 =
  28. 28.13 × 8 =
  29. 29.30 × 8 =
  30. 30.42 × 4 =
  31. 31.12 × 4 =
  32. 32.73 × 4 =
  33. 33.23 × 4 =
  34. 34.27 × 4 =
  35. 35.46 × 4 =
  36. 36.47 × 4 =
  37. 37.39 × 4 =
  38. 38.22 × 8 =
  39. 39.43 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 288
  2. 96
  3. 284
  4. 204
  5. 320
  6. 76
  7. 152
  8. 224
  9. 208
  10. 160
  11. 288
  12. 300
  13. 136
  14. 264
  15. 192
  16. 112
  17. 144
  18. 128
  19. 248
  20. 276
  21. 272
  22. 272
  23. 232
  24. 252
  25. 60
  26. 296
  27. 180
  28. 104
  29. 240
  30. 168
  31. 48
  32. 292
  33. 92
  34. 108
  35. 184
  36. 188
  37. 156
  38. 176
  39. 172
  40. 232

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