← 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 773 · 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. 1.22 × 8 =
  2. 2.38 × 4 =
  3. 3.32 × 8 =
  4. 4.38 × 8 =
  5. 5.36 × 8 =
  6. 6.28 × 4 =
  7. 7.20 × 4 =
  8. 8.34 × 8 =
  9. 9.50 × 4 =
  10. 10.18 × 8 =
  11. 11.43 × 4 =
  12. 12.68 × 4 =
  13. 13.15 × 4 =
  14. 14.24 × 8 =
  15. 15.67 × 4 =
  16. 16.24 × 4 =
  17. 17.37 × 4 =
  18. 18.74 × 4 =
  19. 19.33 × 4 =
  20. 20.16 × 4 =
  21. 21.30 × 8 =
  22. 22.16 × 8 =
  23. 23.47 × 4 =
  24. 24.44 × 4 =
  25. 25.17 × 8 =
  26. 26.12 × 8 =
  27. 27.35 × 8 =
  28. 28.41 × 4 =
  29. 29.18 × 4 =
  30. 30.31 × 8 =
  31. 31.39 × 8 =
  32. 32.58 × 4 =
  33. 33.25 × 8 =
  34. 34.13 × 8 =
  35. 35.45 × 4 =
  36. 36.23 × 4 =
  37. 37.17 × 4 =
  38. 38.26 × 4 =
  39. 39.12 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 176
  2. 152
  3. 256
  4. 304
  5. 288
  6. 112
  7. 80
  8. 272
  9. 200
  10. 144
  11. 172
  12. 272
  13. 60
  14. 192
  15. 268
  16. 96
  17. 148
  18. 296
  19. 132
  20. 64
  21. 240
  22. 128
  23. 188
  24. 176
  25. 136
  26. 96
  27. 280
  28. 164
  29. 72
  30. 248
  31. 312
  32. 232
  33. 200
  34. 104
  35. 180
  36. 92
  37. 68
  38. 104
  39. 48
  40. 232

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