← 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 314 · 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. 1.32 × 8 =
  2. 2.14 × 4 =
  3. 3.37 × 4 =
  4. 4.56 × 4 =
  5. 5.19 × 8 =
  6. 6.29 × 8 =
  7. 7.40 × 4 =
  8. 8.22 × 4 =
  9. 9.43 × 4 =
  10. 10.27 × 8 =
  11. 11.51 × 4 =
  12. 12.69 × 4 =
  13. 13.49 × 4 =
  14. 14.71 × 4 =
  15. 15.12 × 4 =
  16. 16.23 × 8 =
  17. 17.36 × 8 =
  18. 18.39 × 8 =
  19. 19.53 × 4 =
  20. 20.17 × 8 =
  21. 21.60 × 4 =
  22. 22.19 × 4 =
  23. 23.38 × 8 =
  24. 24.15 × 8 =
  25. 25.37 × 8 =
  26. 26.64 × 4 =
  27. 27.35 × 4 =
  28. 28.26 × 8 =
  29. 29.47 × 4 =
  30. 30.35 × 8 =
  31. 31.72 × 4 =
  32. 32.70 × 4 =
  33. 33.33 × 4 =
  34. 34.62 × 4 =
  35. 35.13 × 8 =
  36. 36.25 × 8 =
  37. 37.40 × 8 =
  38. 38.28 × 8 =
  39. 39.58 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 256
  2. 56
  3. 148
  4. 224
  5. 152
  6. 232
  7. 160
  8. 88
  9. 172
  10. 216
  11. 204
  12. 276
  13. 196
  14. 284
  15. 48
  16. 184
  17. 288
  18. 312
  19. 212
  20. 136
  21. 240
  22. 76
  23. 304
  24. 120
  25. 296
  26. 256
  27. 140
  28. 208
  29. 188
  30. 280
  31. 288
  32. 280
  33. 132
  34. 248
  35. 104
  36. 200
  37. 320
  38. 224
  39. 232
  40. 168

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