← 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 42 · 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. 1.21 × 8 =
  2. 2.15 × 4 =
  3. 3.51 × 4 =
  4. 4.52 × 4 =
  5. 5.20 × 4 =
  6. 6.18 × 8 =
  7. 7.66 × 4 =
  8. 8.29 × 8 =
  9. 9.46 × 4 =
  10. 10.58 × 4 =
  11. 11.31 × 8 =
  12. 12.39 × 4 =
  13. 13.40 × 8 =
  14. 14.53 × 4 =
  15. 15.37 × 8 =
  16. 16.45 × 4 =
  17. 17.24 × 4 =
  18. 18.61 × 4 =
  19. 19.28 × 8 =
  20. 20.18 × 4 =
  21. 21.16 × 8 =
  22. 22.13 × 8 =
  23. 23.30 × 8 =
  24. 24.34 × 8 =
  25. 25.25 × 4 =
  26. 26.12 × 8 =
  27. 27.71 × 4 =
  28. 28.22 × 8 =
  29. 29.42 × 4 =
  30. 30.67 × 4 =
  31. 31.27 × 8 =
  32. 32.33 × 8 =
  33. 33.33 × 4 =
  34. 34.41 × 4 =
  35. 35.16 × 4 =
  36. 36.24 × 8 =
  37. 37.17 × 4 =
  38. 38.74 × 4 =
  39. 39.23 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 168
  2. 60
  3. 204
  4. 208
  5. 80
  6. 144
  7. 264
  8. 232
  9. 184
  10. 232
  11. 248
  12. 156
  13. 320
  14. 212
  15. 296
  16. 180
  17. 96
  18. 244
  19. 224
  20. 72
  21. 128
  22. 104
  23. 240
  24. 272
  25. 100
  26. 96
  27. 284
  28. 176
  29. 168
  30. 268
  31. 216
  32. 264
  33. 132
  34. 164
  35. 64
  36. 192
  37. 68
  38. 296
  39. 184
  40. 200

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