← 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 913 · 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. 2.38 × 8 =
  3. 3.29 × 4 =
  4. 4.40 × 8 =
  5. 5.31 × 8 =
  6. 6.43 × 4 =
  7. 7.62 × 4 =
  8. 8.41 × 4 =
  9. 9.26 × 8 =
  10. 10.25 × 8 =
  11. 11.54 × 4 =
  12. 12.56 × 4 =
  13. 13.36 × 4 =
  14. 14.33 × 8 =
  15. 15.53 × 4 =
  16. 16.65 × 4 =
  17. 17.22 × 8 =
  18. 18.24 × 8 =
  19. 19.39 × 4 =
  20. 20.70 × 4 =
  21. 21.32 × 8 =
  22. 22.45 × 4 =
  23. 23.22 × 4 =
  24. 24.71 × 4 =
  25. 25.37 × 8 =
  26. 26.39 × 8 =
  27. 27.49 × 4 =
  28. 28.26 × 4 =
  29. 29.66 × 4 =
  30. 30.63 × 4 =
  31. 31.28 × 8 =
  32. 32.16 × 8 =
  33. 33.19 × 4 =
  34. 34.75 × 4 =
  35. 35.18 × 8 =
  36. 36.72 × 4 =
  37. 37.24 × 4 =
  38. 38.21 × 8 =
  39. 39.35 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 48
  2. 304
  3. 116
  4. 320
  5. 248
  6. 172
  7. 248
  8. 164
  9. 208
  10. 200
  11. 216
  12. 224
  13. 144
  14. 264
  15. 212
  16. 260
  17. 176
  18. 192
  19. 156
  20. 280
  21. 256
  22. 180
  23. 88
  24. 284
  25. 296
  26. 312
  27. 196
  28. 104
  29. 264
  30. 252
  31. 224
  32. 128
  33. 76
  34. 300
  35. 144
  36. 288
  37. 96
  38. 168
  39. 140
  40. 232

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