← 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 111 · 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. 1.39 × 8 =
  2. 2.22 × 8 =
  3. 3.12 × 8 =
  4. 4.19 × 4 =
  5. 5.16 × 8 =
  6. 6.40 × 8 =
  7. 7.31 × 4 =
  8. 8.13 × 8 =
  9. 9.28 × 4 =
  10. 10.45 × 4 =
  11. 11.16 × 4 =
  12. 12.23 × 8 =
  13. 13.38 × 8 =
  14. 14.67 × 4 =
  15. 15.71 × 4 =
  16. 16.56 × 4 =
  17. 17.21 × 4 =
  18. 18.73 × 4 =
  19. 19.54 × 4 =
  20. 20.18 × 4 =
  21. 21.53 × 4 =
  22. 22.33 × 4 =
  23. 23.21 × 8 =
  24. 24.34 × 8 =
  25. 25.32 × 8 =
  26. 26.24 × 4 =
  27. 27.17 × 4 =
  28. 28.43 × 4 =
  29. 29.25 × 8 =
  30. 30.46 × 4 =
  31. 31.27 × 8 =
  32. 32.38 × 4 =
  33. 33.62 × 4 =
  34. 34.68 × 4 =
  35. 35.22 × 4 =
  36. 36.69 × 4 =
  37. 37.33 × 8 =
  38. 38.17 × 8 =
  39. 39.74 × 4 =
  40. 40.37 × 8 =

Answer key

  1. 312
  2. 176
  3. 96
  4. 76
  5. 128
  6. 320
  7. 124
  8. 104
  9. 112
  10. 180
  11. 64
  12. 184
  13. 304
  14. 268
  15. 284
  16. 224
  17. 84
  18. 292
  19. 216
  20. 72
  21. 212
  22. 132
  23. 168
  24. 272
  25. 256
  26. 96
  27. 68
  28. 172
  29. 200
  30. 184
  31. 216
  32. 152
  33. 248
  34. 272
  35. 88
  36. 276
  37. 264
  38. 136
  39. 296
  40. 296

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