← 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 487 · 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. 1.16 × 4 =
  2. 2.73 × 4 =
  3. 3.24 × 8 =
  4. 4.17 × 8 =
  5. 5.33 × 4 =
  6. 6.20 × 4 =
  7. 7.32 × 4 =
  8. 8.28 × 8 =
  9. 9.74 × 4 =
  10. 10.36 × 8 =
  11. 11.29 × 8 =
  12. 12.43 × 4 =
  13. 13.37 × 4 =
  14. 14.12 × 8 =
  15. 15.68 × 4 =
  16. 16.56 × 4 =
  17. 17.42 × 4 =
  18. 18.58 × 4 =
  19. 19.48 × 4 =
  20. 20.20 × 8 =
  21. 21.72 × 4 =
  22. 22.27 × 8 =
  23. 23.14 × 8 =
  24. 24.22 × 8 =
  25. 25.50 × 4 =
  26. 26.36 × 4 =
  27. 27.59 × 4 =
  28. 28.35 × 8 =
  29. 29.38 × 8 =
  30. 30.26 × 8 =
  31. 31.47 × 4 =
  32. 32.31 × 4 =
  33. 33.32 × 8 =
  34. 34.40 × 8 =
  35. 35.15 × 8 =
  36. 36.75 × 4 =
  37. 37.46 × 4 =
  38. 38.23 × 8 =
  39. 39.17 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 64
  2. 292
  3. 192
  4. 136
  5. 132
  6. 80
  7. 128
  8. 224
  9. 296
  10. 288
  11. 232
  12. 172
  13. 148
  14. 96
  15. 272
  16. 224
  17. 168
  18. 232
  19. 192
  20. 160
  21. 288
  22. 216
  23. 112
  24. 176
  25. 200
  26. 144
  27. 236
  28. 280
  29. 304
  30. 208
  31. 188
  32. 124
  33. 256
  34. 320
  35. 120
  36. 300
  37. 184
  38. 184
  39. 68
  40. 160

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