← 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 655 · 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. 1.38 × 4 =
  2. 2.19 × 8 =
  3. 3.29 × 8 =
  4. 4.28 × 8 =
  5. 5.43 × 4 =
  6. 6.17 × 8 =
  7. 7.50 × 4 =
  8. 8.66 × 4 =
  9. 9.41 × 4 =
  10. 10.47 × 4 =
  11. 11.31 × 4 =
  12. 12.23 × 4 =
  13. 13.26 × 8 =
  14. 14.67 × 4 =
  15. 15.53 × 4 =
  16. 16.59 × 4 =
  17. 17.70 × 4 =
  18. 18.28 × 4 =
  19. 19.36 × 8 =
  20. 20.60 × 4 =
  21. 21.16 × 8 =
  22. 22.55 × 4 =
  23. 23.63 × 4 =
  24. 24.13 × 8 =
  25. 25.20 × 8 =
  26. 26.73 × 4 =
  27. 27.52 × 4 =
  28. 28.14 × 8 =
  29. 29.64 × 4 =
  30. 30.31 × 8 =
  31. 31.75 × 4 =
  32. 32.37 × 8 =
  33. 33.38 × 8 =
  34. 34.61 × 4 =
  35. 35.32 × 4 =
  36. 36.29 × 4 =
  37. 37.72 × 4 =
  38. 38.12 × 8 =
  39. 39.26 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 152
  2. 152
  3. 232
  4. 224
  5. 172
  6. 136
  7. 200
  8. 264
  9. 164
  10. 188
  11. 124
  12. 92
  13. 208
  14. 268
  15. 212
  16. 236
  17. 280
  18. 112
  19. 288
  20. 240
  21. 128
  22. 220
  23. 252
  24. 104
  25. 160
  26. 292
  27. 208
  28. 112
  29. 256
  30. 248
  31. 300
  32. 296
  33. 304
  34. 244
  35. 128
  36. 116
  37. 288
  38. 96
  39. 104
  40. 296

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