← 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 518 · 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. 1.17 × 8 =
  2. 2.20 × 8 =
  3. 3.46 × 4 =
  4. 4.34 × 8 =
  5. 5.37 × 4 =
  6. 6.22 × 4 =
  7. 7.17 × 4 =
  8. 8.13 × 8 =
  9. 9.33 × 4 =
  10. 10.49 × 4 =
  11. 11.33 × 8 =
  12. 12.39 × 4 =
  13. 13.36 × 8 =
  14. 14.26 × 8 =
  15. 15.12 × 8 =
  16. 16.69 × 4 =
  17. 17.39 × 8 =
  18. 18.14 × 8 =
  19. 19.44 × 4 =
  20. 20.16 × 8 =
  21. 21.38 × 8 =
  22. 22.31 × 8 =
  23. 23.29 × 4 =
  24. 24.64 × 4 =
  25. 25.74 × 4 =
  26. 26.50 × 4 =
  27. 27.28 × 8 =
  28. 28.63 × 4 =
  29. 29.25 × 4 =
  30. 30.71 × 4 =
  31. 31.38 × 4 =
  32. 32.48 × 4 =
  33. 33.62 × 4 =
  34. 34.41 × 4 =
  35. 35.19 × 4 =
  36. 36.24 × 4 =
  37. 37.40 × 8 =
  38. 38.18 × 8 =
  39. 39.24 × 8 =
  40. 40.68 × 4 =

Answer key

  1. 136
  2. 160
  3. 184
  4. 272
  5. 148
  6. 88
  7. 68
  8. 104
  9. 132
  10. 196
  11. 264
  12. 156
  13. 288
  14. 208
  15. 96
  16. 276
  17. 312
  18. 112
  19. 176
  20. 128
  21. 304
  22. 248
  23. 116
  24. 256
  25. 296
  26. 200
  27. 224
  28. 252
  29. 100
  30. 284
  31. 152
  32. 192
  33. 248
  34. 164
  35. 76
  36. 96
  37. 320
  38. 144
  39. 192
  40. 272

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