← 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 862 · 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. 1.12 × 4 =
  2. 2.39 × 4 =
  3. 3.16 × 4 =
  4. 4.35 × 8 =
  5. 5.69 × 4 =
  6. 6.13 × 8 =
  7. 7.29 × 4 =
  8. 8.58 × 4 =
  9. 9.34 × 4 =
  10. 10.18 × 8 =
  11. 11.38 × 8 =
  12. 12.12 × 8 =
  13. 13.29 × 8 =
  14. 14.21 × 8 =
  15. 15.32 × 8 =
  16. 16.26 × 8 =
  17. 17.55 × 4 =
  18. 18.61 × 4 =
  19. 19.19 × 8 =
  20. 20.70 × 4 =
  21. 21.32 × 4 =
  22. 22.40 × 8 =
  23. 23.22 × 8 =
  24. 24.71 × 4 =
  25. 25.17 × 4 =
  26. 26.24 × 8 =
  27. 27.15 × 8 =
  28. 28.47 × 4 =
  29. 29.40 × 4 =
  30. 30.62 × 4 =
  31. 31.33 × 8 =
  32. 32.17 × 8 =
  33. 33.63 × 4 =
  34. 34.67 × 4 =
  35. 35.34 × 8 =
  36. 36.66 × 4 =
  37. 37.31 × 8 =
  38. 38.37 × 8 =
  39. 39.30 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 48
  2. 156
  3. 64
  4. 280
  5. 276
  6. 104
  7. 116
  8. 232
  9. 136
  10. 144
  11. 304
  12. 96
  13. 232
  14. 168
  15. 256
  16. 208
  17. 220
  18. 244
  19. 152
  20. 280
  21. 128
  22. 320
  23. 176
  24. 284
  25. 68
  26. 192
  27. 120
  28. 188
  29. 160
  30. 248
  31. 264
  32. 136
  33. 252
  34. 268
  35. 272
  36. 264
  37. 248
  38. 296
  39. 120
  40. 140

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