← 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 432 · 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. 1.40 × 8 =
  2. 2.16 × 8 =
  3. 3.58 × 4 =
  4. 4.27 × 4 =
  5. 5.38 × 8 =
  6. 6.30 × 8 =
  7. 7.13 × 8 =
  8. 8.22 × 8 =
  9. 9.66 × 4 =
  10. 10.61 × 4 =
  11. 11.73 × 4 =
  12. 12.47 × 4 =
  13. 13.45 × 4 =
  14. 14.49 × 4 =
  15. 15.14 × 8 =
  16. 16.29 × 8 =
  17. 17.56 × 4 =
  18. 18.43 × 4 =
  19. 19.41 × 4 =
  20. 20.28 × 8 =
  21. 21.70 × 4 =
  22. 22.20 × 4 =
  23. 23.46 × 4 =
  24. 24.39 × 8 =
  25. 25.17 × 4 =
  26. 26.74 × 4 =
  27. 27.20 × 8 =
  28. 28.48 × 4 =
  29. 29.42 × 4 =
  30. 30.59 × 4 =
  31. 31.19 × 8 =
  32. 32.38 × 4 =
  33. 33.25 × 8 =
  34. 34.32 × 8 =
  35. 35.65 × 4 =
  36. 36.12 × 4 =
  37. 37.21 × 8 =
  38. 38.15 × 4 =
  39. 39.44 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 320
  2. 128
  3. 232
  4. 108
  5. 304
  6. 240
  7. 104
  8. 176
  9. 264
  10. 244
  11. 292
  12. 188
  13. 180
  14. 196
  15. 112
  16. 232
  17. 224
  18. 172
  19. 164
  20. 224
  21. 280
  22. 80
  23. 184
  24. 312
  25. 68
  26. 296
  27. 160
  28. 192
  29. 168
  30. 236
  31. 152
  32. 152
  33. 200
  34. 256
  35. 260
  36. 48
  37. 168
  38. 60
  39. 176
  40. 96

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