← 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 639 · 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. 1.13 × 8 =
  2. 2.41 × 4 =
  3. 3.54 × 4 =
  4. 4.53 × 4 =
  5. 5.12 × 8 =
  6. 6.15 × 8 =
  7. 7.62 × 4 =
  8. 8.38 × 8 =
  9. 9.38 × 4 =
  10. 10.63 × 4 =
  11. 11.14 × 8 =
  12. 12.21 × 8 =
  13. 13.60 × 4 =
  14. 14.30 × 8 =
  15. 15.22 × 4 =
  16. 16.33 × 8 =
  17. 17.42 × 4 =
  18. 18.25 × 8 =
  19. 19.18 × 8 =
  20. 20.29 × 8 =
  21. 21.23 × 8 =
  22. 22.61 × 4 =
  23. 23.74 × 4 =
  24. 24.20 × 8 =
  25. 25.17 × 8 =
  26. 26.31 × 8 =
  27. 27.37 × 4 =
  28. 28.67 × 4 =
  29. 29.19 × 4 =
  30. 30.24 × 8 =
  31. 31.69 × 4 =
  32. 32.39 × 4 =
  33. 33.35 × 4 =
  34. 34.68 × 4 =
  35. 35.40 × 4 =
  36. 36.22 × 8 =
  37. 37.65 × 4 =
  38. 38.73 × 4 =
  39. 39.37 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 104
  2. 164
  3. 216
  4. 212
  5. 96
  6. 120
  7. 248
  8. 304
  9. 152
  10. 252
  11. 112
  12. 168
  13. 240
  14. 240
  15. 88
  16. 264
  17. 168
  18. 200
  19. 144
  20. 232
  21. 184
  22. 244
  23. 296
  24. 160
  25. 136
  26. 248
  27. 148
  28. 268
  29. 76
  30. 192
  31. 276
  32. 156
  33. 140
  34. 272
  35. 160
  36. 176
  37. 260
  38. 292
  39. 296
  40. 72

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