← 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 249 · 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. 1.47 × 4 =
  2. 2.44 × 4 =
  3. 3.19 × 4 =
  4. 4.54 × 4 =
  5. 5.45 × 4 =
  6. 6.32 × 4 =
  7. 7.37 × 8 =
  8. 8.36 × 8 =
  9. 9.32 × 8 =
  10. 10.17 × 4 =
  11. 11.27 × 8 =
  12. 12.33 × 8 =
  13. 13.58 × 4 =
  14. 14.23 × 8 =
  15. 15.31 × 8 =
  16. 16.28 × 8 =
  17. 17.16 × 8 =
  18. 18.29 × 8 =
  19. 19.66 × 4 =
  20. 20.16 × 4 =
  21. 21.14 × 8 =
  22. 22.25 × 8 =
  23. 23.12 × 8 =
  24. 24.50 × 4 =
  25. 25.20 × 4 =
  26. 26.39 × 8 =
  27. 27.21 × 8 =
  28. 28.35 × 4 =
  29. 29.15 × 8 =
  30. 30.30 × 4 =
  31. 31.17 × 8 =
  32. 32.34 × 4 =
  33. 33.55 × 4 =
  34. 34.67 × 4 =
  35. 35.38 × 4 =
  36. 36.46 × 4 =
  37. 37.41 × 4 =
  38. 38.70 × 4 =
  39. 39.60 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 188
  2. 176
  3. 76
  4. 216
  5. 180
  6. 128
  7. 296
  8. 288
  9. 256
  10. 68
  11. 216
  12. 264
  13. 232
  14. 184
  15. 248
  16. 224
  17. 128
  18. 232
  19. 264
  20. 64
  21. 112
  22. 200
  23. 96
  24. 200
  25. 80
  26. 312
  27. 168
  28. 140
  29. 120
  30. 120
  31. 136
  32. 136
  33. 220
  34. 268
  35. 152
  36. 184
  37. 164
  38. 280
  39. 240
  40. 288

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