← 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 346 · 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. 1.23 × 4 =
  2. 2.69 × 4 =
  3. 3.20 × 8 =
  4. 4.36 × 4 =
  5. 5.31 × 4 =
  6. 6.37 × 8 =
  7. 7.21 × 8 =
  8. 8.14 × 8 =
  9. 9.75 × 4 =
  10. 10.60 × 4 =
  11. 11.73 × 4 =
  12. 12.18 × 4 =
  13. 13.29 × 4 =
  14. 14.41 × 4 =
  15. 15.22 × 8 =
  16. 16.40 × 8 =
  17. 17.23 × 8 =
  18. 18.32 × 8 =
  19. 19.49 × 4 =
  20. 20.33 × 8 =
  21. 21.17 × 8 =
  22. 22.28 × 8 =
  23. 23.19 × 8 =
  24. 24.12 × 8 =
  25. 25.31 × 8 =
  26. 26.16 × 8 =
  27. 27.74 × 4 =
  28. 28.28 × 4 =
  29. 29.38 × 8 =
  30. 30.25 × 4 =
  31. 31.19 × 4 =
  32. 32.17 × 4 =
  33. 33.16 × 4 =
  34. 34.26 × 8 =
  35. 35.13 × 8 =
  36. 36.68 × 4 =
  37. 37.27 × 4 =
  38. 38.25 × 8 =
  39. 39.29 × 8 =
  40. 40.44 × 4 =

Answer key

  1. 92
  2. 276
  3. 160
  4. 144
  5. 124
  6. 296
  7. 168
  8. 112
  9. 300
  10. 240
  11. 292
  12. 72
  13. 116
  14. 164
  15. 176
  16. 320
  17. 184
  18. 256
  19. 196
  20. 264
  21. 136
  22. 224
  23. 152
  24. 96
  25. 248
  26. 128
  27. 296
  28. 112
  29. 304
  30. 100
  31. 76
  32. 68
  33. 64
  34. 208
  35. 104
  36. 272
  37. 108
  38. 200
  39. 232
  40. 176

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