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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 544 · 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. 1.34 × 8 =
  2. 2.32 × 8 =
  3. 3.18 × 8 =
  4. 4.19 × 8 =
  5. 5.33 × 8 =
  6. 6.31 × 8 =
  7. 7.22 × 8 =
  8. 8.44 × 4 =
  9. 9.75 × 4 =
  10. 10.52 × 4 =
  11. 11.69 × 4 =
  12. 12.45 × 4 =
  13. 13.28 × 8 =
  14. 14.43 × 4 =
  15. 15.13 × 8 =
  16. 16.41 × 4 =
  17. 17.20 × 8 =
  18. 18.18 × 4 =
  19. 19.63 × 4 =
  20. 20.39 × 8 =
  21. 21.66 × 4 =
  22. 22.29 × 8 =
  23. 23.14 × 4 =
  24. 24.26 × 8 =
  25. 25.34 × 4 =
  26. 26.17 × 8 =
  27. 27.51 × 4 =
  28. 28.33 × 4 =
  29. 29.58 × 4 =
  30. 30.38 × 4 =
  31. 31.53 × 4 =
  32. 32.59 × 4 =
  33. 33.56 × 4 =
  34. 34.61 × 4 =
  35. 35.30 × 4 =
  36. 36.23 × 8 =
  37. 37.36 × 8 =
  38. 38.38 × 8 =
  39. 39.47 × 4 =
  40. 40.40 × 8 =

Answer key

  1. 272
  2. 256
  3. 144
  4. 152
  5. 264
  6. 248
  7. 176
  8. 176
  9. 300
  10. 208
  11. 276
  12. 180
  13. 224
  14. 172
  15. 104
  16. 164
  17. 160
  18. 72
  19. 252
  20. 312
  21. 264
  22. 232
  23. 56
  24. 208
  25. 136
  26. 136
  27. 204
  28. 132
  29. 232
  30. 152
  31. 212
  32. 236
  33. 224
  34. 244
  35. 120
  36. 184
  37. 288
  38. 304
  39. 188
  40. 320

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