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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 286 · 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. 1.29 × 8 =
  2. 2.15 × 8 =
  3. 3.16 × 8 =
  4. 4.70 × 4 =
  5. 5.75 × 4 =
  6. 6.64 × 4 =
  7. 7.20 × 8 =
  8. 8.37 × 8 =
  9. 9.23 × 8 =
  10. 10.39 × 8 =
  11. 11.23 × 4 =
  12. 12.13 × 4 =
  13. 13.20 × 4 =
  14. 14.32 × 4 =
  15. 15.38 × 4 =
  16. 16.65 × 4 =
  17. 17.49 × 4 =
  18. 18.38 × 8 =
  19. 19.69 × 4 =
  20. 20.35 × 8 =
  21. 21.25 × 4 =
  22. 22.22 × 8 =
  23. 23.46 × 4 =
  24. 24.47 × 4 =
  25. 25.12 × 8 =
  26. 26.43 × 4 =
  27. 27.19 × 4 =
  28. 28.32 × 8 =
  29. 29.34 × 8 =
  30. 30.34 × 4 =
  31. 31.63 × 4 =
  32. 32.17 × 8 =
  33. 33.36 × 8 =
  34. 34.35 × 4 =
  35. 35.51 × 4 =
  36. 36.24 × 8 =
  37. 37.30 × 8 =
  38. 38.71 × 4 =
  39. 39.40 × 8 =
  40. 40.54 × 4 =

Answer key

  1. 232
  2. 120
  3. 128
  4. 280
  5. 300
  6. 256
  7. 160
  8. 296
  9. 184
  10. 312
  11. 92
  12. 52
  13. 80
  14. 128
  15. 152
  16. 260
  17. 196
  18. 304
  19. 276
  20. 280
  21. 100
  22. 176
  23. 184
  24. 188
  25. 96
  26. 172
  27. 76
  28. 256
  29. 272
  30. 136
  31. 252
  32. 136
  33. 288
  34. 140
  35. 204
  36. 192
  37. 240
  38. 284
  39. 320
  40. 216

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