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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 413 · 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. 1.36 × 4 =
  2. 2.55 × 4 =
  3. 3.23 × 4 =
  4. 4.31 × 8 =
  5. 5.38 × 8 =
  6. 6.37 × 8 =
  7. 7.44 × 4 =
  8. 8.26 × 8 =
  9. 9.72 × 4 =
  10. 10.13 × 8 =
  11. 11.17 × 8 =
  12. 12.14 × 4 =
  13. 13.16 × 4 =
  14. 14.40 × 8 =
  15. 15.26 × 4 =
  16. 16.22 × 8 =
  17. 17.24 × 8 =
  18. 18.52 × 4 =
  19. 19.18 × 4 =
  20. 20.54 × 4 =
  21. 21.15 × 8 =
  22. 22.39 × 8 =
  23. 23.20 × 8 =
  24. 24.62 × 4 =
  25. 25.36 × 8 =
  26. 26.12 × 8 =
  27. 27.15 × 4 =
  28. 28.37 × 4 =
  29. 29.16 × 8 =
  30. 30.30 × 8 =
  31. 31.69 × 4 =
  32. 32.66 × 4 =
  33. 33.32 × 8 =
  34. 34.29 × 8 =
  35. 35.70 × 4 =
  36. 36.53 × 4 =
  37. 37.47 × 4 =
  38. 38.21 × 8 =
  39. 39.14 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 144
  2. 220
  3. 92
  4. 248
  5. 304
  6. 296
  7. 176
  8. 208
  9. 288
  10. 104
  11. 136
  12. 56
  13. 64
  14. 320
  15. 104
  16. 176
  17. 192
  18. 208
  19. 72
  20. 216
  21. 120
  22. 312
  23. 160
  24. 248
  25. 288
  26. 96
  27. 60
  28. 148
  29. 128
  30. 240
  31. 276
  32. 264
  33. 256
  34. 232
  35. 280
  36. 212
  37. 188
  38. 168
  39. 112
  40. 84

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