← 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 697 · 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. 1.69 × 4 =
  2. 2.26 × 4 =
  3. 3.61 × 4 =
  4. 4.37 × 8 =
  5. 5.20 × 4 =
  6. 6.12 × 4 =
  7. 7.39 × 8 =
  8. 8.30 × 8 =
  9. 9.54 × 4 =
  10. 10.44 × 4 =
  11. 11.53 × 4 =
  12. 12.26 × 8 =
  13. 13.22 × 8 =
  14. 14.36 × 8 =
  15. 15.43 × 4 =
  16. 16.40 × 4 =
  17. 17.52 × 4 =
  18. 18.50 × 4 =
  19. 19.71 × 4 =
  20. 20.18 × 8 =
  21. 21.16 × 8 =
  22. 22.24 × 4 =
  23. 23.29 × 8 =
  24. 24.13 × 8 =
  25. 25.30 × 4 =
  26. 26.37 × 4 =
  27. 27.75 × 4 =
  28. 28.48 × 4 =
  29. 29.59 × 4 =
  30. 30.66 × 4 =
  31. 31.29 × 4 =
  32. 32.23 × 8 =
  33. 33.25 × 8 =
  34. 34.60 × 4 =
  35. 35.28 × 4 =
  36. 36.18 × 4 =
  37. 37.63 × 4 =
  38. 38.27 × 8 =
  39. 39.32 × 8 =
  40. 40.15 × 8 =

Answer key

  1. 276
  2. 104
  3. 244
  4. 296
  5. 80
  6. 48
  7. 312
  8. 240
  9. 216
  10. 176
  11. 212
  12. 208
  13. 176
  14. 288
  15. 172
  16. 160
  17. 208
  18. 200
  19. 284
  20. 144
  21. 128
  22. 96
  23. 232
  24. 104
  25. 120
  26. 148
  27. 300
  28. 192
  29. 236
  30. 264
  31. 116
  32. 184
  33. 200
  34. 240
  35. 112
  36. 72
  37. 252
  38. 216
  39. 256
  40. 120

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