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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 76 · 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. 1.66 × 4 =
  2. 2.16 × 8 =
  3. 3.62 × 4 =
  4. 4.71 × 4 =
  5. 5.54 × 4 =
  6. 6.36 × 8 =
  7. 7.29 × 8 =
  8. 8.18 × 8 =
  9. 9.75 × 4 =
  10. 10.15 × 4 =
  11. 11.31 × 4 =
  12. 12.29 × 4 =
  13. 13.38 × 8 =
  14. 14.17 × 8 =
  15. 15.31 × 8 =
  16. 16.36 × 4 =
  17. 17.50 × 4 =
  18. 18.34 × 4 =
  19. 19.30 × 8 =
  20. 20.19 × 4 =
  21. 21.26 × 8 =
  22. 22.74 × 4 =
  23. 23.61 × 4 =
  24. 24.68 × 4 =
  25. 25.37 × 8 =
  26. 26.19 × 8 =
  27. 27.72 × 4 =
  28. 28.22 × 4 =
  29. 29.32 × 4 =
  30. 30.32 × 8 =
  31. 31.20 × 8 =
  32. 32.40 × 8 =
  33. 33.52 × 4 =
  34. 34.43 × 4 =
  35. 35.53 × 4 =
  36. 36.70 × 4 =
  37. 37.24 × 8 =
  38. 38.51 × 4 =
  39. 39.55 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 264
  2. 128
  3. 248
  4. 284
  5. 216
  6. 288
  7. 232
  8. 144
  9. 300
  10. 60
  11. 124
  12. 116
  13. 304
  14. 136
  15. 248
  16. 144
  17. 200
  18. 136
  19. 240
  20. 76
  21. 208
  22. 296
  23. 244
  24. 272
  25. 296
  26. 152
  27. 288
  28. 88
  29. 128
  30. 256
  31. 160
  32. 320
  33. 208
  34. 172
  35. 212
  36. 280
  37. 192
  38. 204
  39. 220
  40. 104

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