← 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 216 · 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. 1.50 × 4 =
  2. 2.17 × 4 =
  3. 3.56 × 4 =
  4. 4.53 × 4 =
  5. 5.54 × 4 =
  6. 6.26 × 4 =
  7. 7.24 × 8 =
  8. 8.41 × 4 =
  9. 9.31 × 8 =
  10. 10.33 × 8 =
  11. 11.55 × 4 =
  12. 12.38 × 8 =
  13. 13.31 × 4 =
  14. 14.47 × 4 =
  15. 15.14 × 4 =
  16. 16.64 × 4 =
  17. 17.12 × 8 =
  18. 18.37 × 8 =
  19. 19.29 × 8 =
  20. 20.28 × 8 =
  21. 21.17 × 8 =
  22. 22.20 × 8 =
  23. 23.42 × 4 =
  24. 24.23 × 8 =
  25. 25.69 × 4 =
  26. 26.75 × 4 =
  27. 27.51 × 4 =
  28. 28.19 × 4 =
  29. 29.73 × 4 =
  30. 30.18 × 8 =
  31. 31.12 × 4 =
  32. 32.25 × 8 =
  33. 33.21 × 4 =
  34. 34.32 × 8 =
  35. 35.30 × 8 =
  36. 36.61 × 4 =
  37. 37.18 × 4 =
  38. 38.39 × 8 =
  39. 39.23 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 200
  2. 68
  3. 224
  4. 212
  5. 216
  6. 104
  7. 192
  8. 164
  9. 248
  10. 264
  11. 220
  12. 304
  13. 124
  14. 188
  15. 56
  16. 256
  17. 96
  18. 296
  19. 232
  20. 224
  21. 136
  22. 160
  23. 168
  24. 184
  25. 276
  26. 300
  27. 204
  28. 76
  29. 292
  30. 144
  31. 48
  32. 200
  33. 84
  34. 256
  35. 240
  36. 244
  37. 72
  38. 312
  39. 92
  40. 112

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