← 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 957 · 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. 1.74 × 4 =
  2. 2.30 × 8 =
  3. 3.42 × 4 =
  4. 4.61 × 4 =
  5. 5.25 × 4 =
  6. 6.13 × 8 =
  7. 7.37 × 8 =
  8. 8.62 × 4 =
  9. 9.36 × 8 =
  10. 10.35 × 4 =
  11. 11.59 × 4 =
  12. 12.21 × 8 =
  13. 13.12 × 4 =
  14. 14.19 × 8 =
  15. 15.23 × 8 =
  16. 16.18 × 8 =
  17. 17.39 × 8 =
  18. 18.38 × 8 =
  19. 19.65 × 4 =
  20. 20.32 × 8 =
  21. 21.16 × 8 =
  22. 22.22 × 8 =
  23. 23.27 × 8 =
  24. 24.24 × 4 =
  25. 25.17 × 8 =
  26. 26.71 × 4 =
  27. 27.60 × 4 =
  28. 28.48 × 4 =
  29. 29.66 × 4 =
  30. 30.51 × 4 =
  31. 31.52 × 4 =
  32. 32.26 × 4 =
  33. 33.17 × 4 =
  34. 34.33 × 4 =
  35. 35.47 × 4 =
  36. 36.32 × 4 =
  37. 37.15 × 8 =
  38. 38.24 × 8 =
  39. 39.45 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 296
  2. 240
  3. 168
  4. 244
  5. 100
  6. 104
  7. 296
  8. 248
  9. 288
  10. 140
  11. 236
  12. 168
  13. 48
  14. 152
  15. 184
  16. 144
  17. 312
  18. 304
  19. 260
  20. 256
  21. 128
  22. 176
  23. 216
  24. 96
  25. 136
  26. 284
  27. 240
  28. 192
  29. 264
  30. 204
  31. 208
  32. 104
  33. 68
  34. 132
  35. 188
  36. 128
  37. 120
  38. 192
  39. 180
  40. 232

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