← 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 115 · 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 × 8 =
  2. 2.66 × 4 =
  3. 3.46 × 4 =
  4. 4.34 × 8 =
  5. 5.48 × 4 =
  6. 6.37 × 4 =
  7. 7.28 × 8 =
  8. 8.12 × 8 =
  9. 9.59 × 4 =
  10. 10.62 × 4 =
  11. 11.70 × 4 =
  12. 12.23 × 4 =
  13. 13.17 × 4 =
  14. 14.15 × 4 =
  15. 15.22 × 8 =
  16. 16.20 × 8 =
  17. 17.75 × 4 =
  18. 18.15 × 8 =
  19. 19.74 × 4 =
  20. 20.18 × 8 =
  21. 21.51 × 4 =
  22. 22.43 × 4 =
  23. 23.47 × 4 =
  24. 24.21 × 8 =
  25. 25.39 × 8 =
  26. 26.30 × 8 =
  27. 27.25 × 4 =
  28. 28.67 × 4 =
  29. 29.40 × 8 =
  30. 30.26 × 8 =
  31. 31.41 × 4 =
  32. 32.23 × 8 =
  33. 33.20 × 4 =
  34. 34.29 × 8 =
  35. 35.72 × 4 =
  36. 36.35 × 8 =
  37. 37.14 × 4 =
  38. 38.36 × 8 =
  39. 39.31 × 8 =
  40. 40.54 × 4 =

Answer key

  1. 128
  2. 264
  3. 184
  4. 272
  5. 192
  6. 148
  7. 224
  8. 96
  9. 236
  10. 248
  11. 280
  12. 92
  13. 68
  14. 60
  15. 176
  16. 160
  17. 300
  18. 120
  19. 296
  20. 144
  21. 204
  22. 172
  23. 188
  24. 168
  25. 312
  26. 240
  27. 100
  28. 268
  29. 320
  30. 208
  31. 164
  32. 184
  33. 80
  34. 232
  35. 288
  36. 280
  37. 56
  38. 288
  39. 248
  40. 216

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