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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 854 · 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. 1.54 × 4 =
  2. 2.29 × 8 =
  3. 3.41 × 4 =
  4. 4.33 × 8 =
  5. 5.17 × 8 =
  6. 6.27 × 8 =
  7. 7.64 × 4 =
  8. 8.35 × 8 =
  9. 9.23 × 4 =
  10. 10.67 × 4 =
  11. 11.48 × 4 =
  12. 12.45 × 4 =
  13. 13.39 × 4 =
  14. 14.25 × 4 =
  15. 15.27 × 4 =
  16. 16.38 × 8 =
  17. 17.16 × 8 =
  18. 18.47 × 4 =
  19. 19.69 × 4 =
  20. 20.52 × 4 =
  21. 21.24 × 8 =
  22. 22.66 × 4 =
  23. 23.14 × 4 =
  24. 24.28 × 4 =
  25. 25.37 × 8 =
  26. 26.16 × 4 =
  27. 27.20 × 8 =
  28. 28.12 × 8 =
  29. 29.31 × 8 =
  30. 30.46 × 4 =
  31. 31.40 × 8 =
  32. 32.71 × 4 =
  33. 33.53 × 4 =
  34. 34.39 × 8 =
  35. 35.13 × 8 =
  36. 36.15 × 8 =
  37. 37.60 × 4 =
  38. 38.22 × 8 =
  39. 39.21 × 8 =
  40. 40.50 × 4 =

Answer key

  1. 216
  2. 232
  3. 164
  4. 264
  5. 136
  6. 216
  7. 256
  8. 280
  9. 92
  10. 268
  11. 192
  12. 180
  13. 156
  14. 100
  15. 108
  16. 304
  17. 128
  18. 188
  19. 276
  20. 208
  21. 192
  22. 264
  23. 56
  24. 112
  25. 296
  26. 64
  27. 160
  28. 96
  29. 248
  30. 184
  31. 320
  32. 284
  33. 212
  34. 312
  35. 104
  36. 120
  37. 240
  38. 176
  39. 168
  40. 200

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