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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 539 · 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. 2.17 × 8 =
  3. 3.70 × 4 =
  4. 4.29 × 8 =
  5. 5.60 × 4 =
  6. 6.12 × 4 =
  7. 7.73 × 4 =
  8. 8.52 × 4 =
  9. 9.49 × 4 =
  10. 10.13 × 4 =
  11. 11.65 × 4 =
  12. 12.38 × 8 =
  13. 13.69 × 4 =
  14. 14.13 × 8 =
  15. 15.62 × 4 =
  16. 16.71 × 4 =
  17. 17.63 × 4 =
  18. 18.19 × 4 =
  19. 19.39 × 8 =
  20. 20.19 × 8 =
  21. 21.18 × 4 =
  22. 22.37 × 8 =
  23. 23.24 × 4 =
  24. 24.27 × 4 =
  25. 25.30 × 8 =
  26. 26.59 × 4 =
  27. 27.50 × 4 =
  28. 28.27 × 8 =
  29. 29.23 × 8 =
  30. 30.61 × 4 =
  31. 31.48 × 4 =
  32. 32.34 × 8 =
  33. 33.20 × 8 =
  34. 34.36 × 8 =
  35. 35.15 × 4 =
  36. 36.42 × 4 =
  37. 37.75 × 4 =
  38. 38.24 × 8 =
  39. 39.35 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 264
  2. 136
  3. 280
  4. 232
  5. 240
  6. 48
  7. 292
  8. 208
  9. 196
  10. 52
  11. 260
  12. 304
  13. 276
  14. 104
  15. 248
  16. 284
  17. 252
  18. 76
  19. 312
  20. 152
  21. 72
  22. 296
  23. 96
  24. 108
  25. 240
  26. 236
  27. 200
  28. 216
  29. 184
  30. 244
  31. 192
  32. 272
  33. 160
  34. 288
  35. 60
  36. 168
  37. 300
  38. 192
  39. 280
  40. 224

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