← 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 169 · 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. 1.58 × 4 =
  2. 2.71 × 4 =
  3. 3.38 × 8 =
  4. 4.37 × 8 =
  5. 5.55 × 4 =
  6. 6.54 × 4 =
  7. 7.13 × 8 =
  8. 8.32 × 8 =
  9. 9.23 × 4 =
  10. 10.36 × 4 =
  11. 11.46 × 4 =
  12. 12.61 × 4 =
  13. 13.27 × 4 =
  14. 14.24 × 8 =
  15. 15.39 × 4 =
  16. 16.21 × 8 =
  17. 17.22 × 4 =
  18. 18.44 × 4 =
  19. 19.52 × 4 =
  20. 20.40 × 8 =
  21. 21.23 × 8 =
  22. 22.21 × 4 =
  23. 23.33 × 8 =
  24. 24.25 × 8 =
  25. 25.19 × 8 =
  26. 26.63 × 4 =
  27. 27.36 × 8 =
  28. 28.62 × 4 =
  29. 29.30 × 8 =
  30. 30.19 × 4 =
  31. 31.16 × 8 =
  32. 32.29 × 4 =
  33. 33.34 × 4 =
  34. 34.15 × 8 =
  35. 35.34 × 8 =
  36. 36.18 × 8 =
  37. 37.64 × 4 =
  38. 38.26 × 8 =
  39. 39.20 × 8 =
  40. 40.65 × 4 =

Answer key

  1. 232
  2. 284
  3. 304
  4. 296
  5. 220
  6. 216
  7. 104
  8. 256
  9. 92
  10. 144
  11. 184
  12. 244
  13. 108
  14. 192
  15. 156
  16. 168
  17. 88
  18. 176
  19. 208
  20. 320
  21. 184
  22. 84
  23. 264
  24. 200
  25. 152
  26. 252
  27. 288
  28. 248
  29. 240
  30. 76
  31. 128
  32. 116
  33. 136
  34. 120
  35. 272
  36. 144
  37. 256
  38. 208
  39. 160
  40. 260

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