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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 406 · 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. 1.72 × 4 =
  2. 2.27 × 8 =
  3. 3.22 × 8 =
  4. 4.24 × 8 =
  5. 5.13 × 8 =
  6. 6.31 × 8 =
  7. 7.23 × 4 =
  8. 8.60 × 4 =
  9. 9.33 × 8 =
  10. 10.19 × 8 =
  11. 11.38 × 4 =
  12. 12.16 × 8 =
  13. 13.31 × 4 =
  14. 14.52 × 4 =
  15. 15.63 × 4 =
  16. 16.19 × 4 =
  17. 17.20 × 8 =
  18. 18.68 × 4 =
  19. 19.27 × 4 =
  20. 20.25 × 4 =
  21. 21.48 × 4 =
  22. 22.14 × 4 =
  23. 23.37 × 8 =
  24. 24.74 × 4 =
  25. 25.57 × 4 =
  26. 26.32 × 8 =
  27. 27.30 × 8 =
  28. 28.67 × 4 =
  29. 29.17 × 8 =
  30. 30.12 × 8 =
  31. 31.17 × 4 =
  32. 32.58 × 4 =
  33. 33.40 × 4 =
  34. 34.42 × 4 =
  35. 35.70 × 4 =
  36. 36.43 × 4 =
  37. 37.49 × 4 =
  38. 38.36 × 8 =
  39. 39.35 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 288
  2. 216
  3. 176
  4. 192
  5. 104
  6. 248
  7. 92
  8. 240
  9. 264
  10. 152
  11. 152
  12. 128
  13. 124
  14. 208
  15. 252
  16. 76
  17. 160
  18. 272
  19. 108
  20. 100
  21. 192
  22. 56
  23. 296
  24. 296
  25. 228
  26. 256
  27. 240
  28. 268
  29. 136
  30. 96
  31. 68
  32. 232
  33. 160
  34. 168
  35. 280
  36. 172
  37. 196
  38. 288
  39. 280
  40. 312

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