← 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 565 · 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. 1.37 × 4 =
  2. 2.72 × 4 =
  3. 3.22 × 4 =
  4. 4.52 × 4 =
  5. 5.21 × 8 =
  6. 6.31 × 8 =
  7. 7.60 × 4 =
  8. 8.15 × 8 =
  9. 9.38 × 8 =
  10. 10.30 × 4 =
  11. 11.27 × 8 =
  12. 12.33 × 4 =
  13. 13.75 × 4 =
  14. 14.69 × 4 =
  15. 15.62 × 4 =
  16. 16.48 × 4 =
  17. 17.34 × 4 =
  18. 18.13 × 8 =
  19. 19.41 × 4 =
  20. 20.65 × 4 =
  21. 21.23 × 4 =
  22. 22.22 × 8 =
  23. 23.21 × 4 =
  24. 24.32 × 8 =
  25. 25.34 × 8 =
  26. 26.33 × 8 =
  27. 27.58 × 4 =
  28. 28.31 × 4 =
  29. 29.54 × 4 =
  30. 30.39 × 8 =
  31. 31.40 × 4 =
  32. 32.19 × 8 =
  33. 33.70 × 4 =
  34. 34.23 × 8 =
  35. 35.24 × 4 =
  36. 36.24 × 8 =
  37. 37.44 × 4 =
  38. 38.67 × 4 =
  39. 39.36 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 148
  2. 288
  3. 88
  4. 208
  5. 168
  6. 248
  7. 240
  8. 120
  9. 304
  10. 120
  11. 216
  12. 132
  13. 300
  14. 276
  15. 248
  16. 192
  17. 136
  18. 104
  19. 164
  20. 260
  21. 92
  22. 176
  23. 84
  24. 256
  25. 272
  26. 264
  27. 232
  28. 124
  29. 216
  30. 312
  31. 160
  32. 152
  33. 280
  34. 184
  35. 96
  36. 192
  37. 176
  38. 268
  39. 144
  40. 240

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