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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 326 · 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. 1.66 × 4 =
  2. 2.29 × 8 =
  3. 3.19 × 8 =
  4. 4.59 × 4 =
  5. 5.31 × 4 =
  6. 6.35 × 4 =
  7. 7.36 × 4 =
  8. 8.45 × 4 =
  9. 9.25 × 4 =
  10. 10.49 × 4 =
  11. 11.43 × 4 =
  12. 12.28 × 4 =
  13. 13.58 × 4 =
  14. 14.27 × 4 =
  15. 15.68 × 4 =
  16. 16.26 × 8 =
  17. 17.61 × 4 =
  18. 18.18 × 8 =
  19. 19.32 × 8 =
  20. 20.17 × 4 =
  21. 21.19 × 4 =
  22. 22.57 × 4 =
  23. 23.37 × 4 =
  24. 24.47 × 4 =
  25. 25.50 × 4 =
  26. 26.40 × 8 =
  27. 27.18 × 4 =
  28. 28.22 × 8 =
  29. 29.20 × 8 =
  30. 30.73 × 4 =
  31. 31.38 × 4 =
  32. 32.27 × 8 =
  33. 33.28 × 8 =
  34. 34.70 × 4 =
  35. 35.31 × 8 =
  36. 36.35 × 8 =
  37. 37.51 × 4 =
  38. 38.26 × 4 =
  39. 39.24 × 8 =
  40. 40.39 × 4 =

Answer key

  1. 264
  2. 232
  3. 152
  4. 236
  5. 124
  6. 140
  7. 144
  8. 180
  9. 100
  10. 196
  11. 172
  12. 112
  13. 232
  14. 108
  15. 272
  16. 208
  17. 244
  18. 144
  19. 256
  20. 68
  21. 76
  22. 228
  23. 148
  24. 188
  25. 200
  26. 320
  27. 72
  28. 176
  29. 160
  30. 292
  31. 152
  32. 216
  33. 224
  34. 280
  35. 248
  36. 280
  37. 204
  38. 104
  39. 192
  40. 156

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