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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 345 · 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. 1.32 × 8 =
  2. 2.20 × 8 =
  3. 3.47 × 4 =
  4. 4.37 × 8 =
  5. 5.72 × 4 =
  6. 6.20 × 4 =
  7. 7.27 × 8 =
  8. 8.46 × 4 =
  9. 9.16 × 4 =
  10. 10.49 × 4 =
  11. 11.31 × 8 =
  12. 12.30 × 4 =
  13. 13.22 × 8 =
  14. 14.12 × 8 =
  15. 15.17 × 8 =
  16. 16.42 × 4 =
  17. 17.36 × 8 =
  18. 18.64 × 4 =
  19. 19.13 × 4 =
  20. 20.34 × 8 =
  21. 21.24 × 8 =
  22. 22.52 × 4 =
  23. 23.48 × 4 =
  24. 24.23 × 8 =
  25. 25.69 × 4 =
  26. 26.19 × 4 =
  27. 27.27 × 4 =
  28. 28.26 × 8 =
  29. 29.19 × 8 =
  30. 30.35 × 8 =
  31. 31.38 × 8 =
  32. 32.14 × 8 =
  33. 33.30 × 8 =
  34. 34.60 × 4 =
  35. 35.43 × 4 =
  36. 36.24 × 4 =
  37. 37.29 × 8 =
  38. 38.55 × 4 =
  39. 39.18 × 8 =
  40. 40.26 × 4 =

Answer key

  1. 256
  2. 160
  3. 188
  4. 296
  5. 288
  6. 80
  7. 216
  8. 184
  9. 64
  10. 196
  11. 248
  12. 120
  13. 176
  14. 96
  15. 136
  16. 168
  17. 288
  18. 256
  19. 52
  20. 272
  21. 192
  22. 208
  23. 192
  24. 184
  25. 276
  26. 76
  27. 108
  28. 208
  29. 152
  30. 280
  31. 304
  32. 112
  33. 240
  34. 240
  35. 172
  36. 96
  37. 232
  38. 220
  39. 144
  40. 104

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