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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 152 · 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. 1.37 × 8 =
  2. 2.61 × 4 =
  3. 3.66 × 4 =
  4. 4.71 × 4 =
  5. 5.69 × 4 =
  6. 6.28 × 8 =
  7. 7.38 × 4 =
  8. 8.30 × 8 =
  9. 9.42 × 4 =
  10. 10.18 × 4 =
  11. 11.40 × 8 =
  12. 12.39 × 8 =
  13. 13.27 × 4 =
  14. 14.68 × 4 =
  15. 15.24 × 8 =
  16. 16.14 × 8 =
  17. 17.34 × 8 =
  18. 18.31 × 8 =
  19. 19.20 × 8 =
  20. 20.46 × 4 =
  21. 21.35 × 8 =
  22. 22.33 × 8 =
  23. 23.15 × 4 =
  24. 24.25 × 4 =
  25. 25.12 × 8 =
  26. 26.17 × 8 =
  27. 27.72 × 4 =
  28. 28.33 × 4 =
  29. 29.41 × 4 =
  30. 30.27 × 8 =
  31. 31.18 × 8 =
  32. 32.26 × 8 =
  33. 33.75 × 4 =
  34. 34.31 × 4 =
  35. 35.36 × 8 =
  36. 36.14 × 4 =
  37. 37.29 × 8 =
  38. 38.34 × 4 =
  39. 39.45 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 296
  2. 244
  3. 264
  4. 284
  5. 276
  6. 224
  7. 152
  8. 240
  9. 168
  10. 72
  11. 320
  12. 312
  13. 108
  14. 272
  15. 192
  16. 112
  17. 272
  18. 248
  19. 160
  20. 184
  21. 280
  22. 264
  23. 60
  24. 100
  25. 96
  26. 136
  27. 288
  28. 132
  29. 164
  30. 216
  31. 144
  32. 208
  33. 300
  34. 124
  35. 288
  36. 56
  37. 232
  38. 136
  39. 180
  40. 200

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