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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 527 · 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. 1.18 × 8 =
  2. 2.31 × 8 =
  3. 3.34 × 4 =
  4. 4.14 × 8 =
  5. 5.35 × 8 =
  6. 6.29 × 8 =
  7. 7.36 × 4 =
  8. 8.32 × 8 =
  9. 9.23 × 8 =
  10. 10.52 × 4 =
  11. 11.21 × 8 =
  12. 12.29 × 4 =
  13. 13.68 × 4 =
  14. 14.75 × 4 =
  15. 15.58 × 4 =
  16. 16.30 × 8 =
  17. 17.48 × 4 =
  18. 18.28 × 8 =
  19. 19.44 × 4 =
  20. 20.28 × 4 =
  21. 21.18 × 4 =
  22. 22.33 × 8 =
  23. 23.19 × 8 =
  24. 24.22 × 8 =
  25. 25.13 × 4 =
  26. 26.43 × 4 =
  27. 27.27 × 8 =
  28. 28.26 × 8 =
  29. 29.45 × 4 =
  30. 30.24 × 4 =
  31. 31.13 × 8 =
  32. 32.34 × 8 =
  33. 33.64 × 4 =
  34. 34.17 × 8 =
  35. 35.39 × 8 =
  36. 36.38 × 8 =
  37. 37.73 × 4 =
  38. 38.24 × 8 =
  39. 39.20 × 8 =
  40. 40.62 × 4 =

Answer key

  1. 144
  2. 248
  3. 136
  4. 112
  5. 280
  6. 232
  7. 144
  8. 256
  9. 184
  10. 208
  11. 168
  12. 116
  13. 272
  14. 300
  15. 232
  16. 240
  17. 192
  18. 224
  19. 176
  20. 112
  21. 72
  22. 264
  23. 152
  24. 176
  25. 52
  26. 172
  27. 216
  28. 208
  29. 180
  30. 96
  31. 104
  32. 272
  33. 256
  34. 136
  35. 312
  36. 304
  37. 292
  38. 192
  39. 160
  40. 248

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