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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 356 · 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. 1.68 × 4 =
  2. 2.13 × 4 =
  3. 3.51 × 4 =
  4. 4.23 × 4 =
  5. 5.16 × 4 =
  6. 6.66 × 4 =
  7. 7.17 × 8 =
  8. 8.54 × 4 =
  9. 9.30 × 8 =
  10. 10.69 × 4 =
  11. 11.21 × 8 =
  12. 12.31 × 8 =
  13. 13.19 × 4 =
  14. 14.47 × 4 =
  15. 15.31 × 4 =
  16. 16.40 × 8 =
  17. 17.12 × 8 =
  18. 18.32 × 4 =
  19. 19.75 × 4 =
  20. 20.30 × 4 =
  21. 21.35 × 8 =
  22. 22.38 × 8 =
  23. 23.22 × 4 =
  24. 24.29 × 8 =
  25. 25.20 × 8 =
  26. 26.23 × 8 =
  27. 27.74 × 4 =
  28. 28.49 × 4 =
  29. 29.15 × 4 =
  30. 30.38 × 4 =
  31. 31.36 × 8 =
  32. 32.22 × 8 =
  33. 33.19 × 8 =
  34. 34.62 × 4 =
  35. 35.44 × 4 =
  36. 36.13 × 8 =
  37. 37.61 × 4 =
  38. 38.33 × 4 =
  39. 39.46 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 272
  2. 52
  3. 204
  4. 92
  5. 64
  6. 264
  7. 136
  8. 216
  9. 240
  10. 276
  11. 168
  12. 248
  13. 76
  14. 188
  15. 124
  16. 320
  17. 96
  18. 128
  19. 300
  20. 120
  21. 280
  22. 304
  23. 88
  24. 232
  25. 160
  26. 184
  27. 296
  28. 196
  29. 60
  30. 152
  31. 288
  32. 176
  33. 152
  34. 248
  35. 176
  36. 104
  37. 244
  38. 132
  39. 184
  40. 312

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