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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 355 · 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. 1.60 × 4 =
  2. 2.27 × 8 =
  3. 3.73 × 4 =
  4. 4.23 × 4 =
  5. 5.39 × 4 =
  6. 6.50 × 4 =
  7. 7.46 × 4 =
  8. 8.22 × 8 =
  9. 9.13 × 4 =
  10. 10.29 × 8 =
  11. 11.31 × 4 =
  12. 12.49 × 4 =
  13. 13.75 × 4 =
  14. 14.34 × 8 =
  15. 15.32 × 4 =
  16. 16.26 × 8 =
  17. 17.38 × 4 =
  18. 18.36 × 8 =
  19. 19.23 × 8 =
  20. 20.15 × 8 =
  21. 21.53 × 4 =
  22. 22.69 × 4 =
  23. 23.35 × 8 =
  24. 24.55 × 4 =
  25. 25.39 × 8 =
  26. 26.35 × 4 =
  27. 27.27 × 4 =
  28. 28.28 × 8 =
  29. 29.38 × 8 =
  30. 30.63 × 4 =
  31. 31.41 × 4 =
  32. 32.15 × 4 =
  33. 33.72 × 4 =
  34. 34.47 × 4 =
  35. 35.30 × 8 =
  36. 36.26 × 4 =
  37. 37.17 × 4 =
  38. 38.48 × 4 =
  39. 39.33 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 240
  2. 216
  3. 292
  4. 92
  5. 156
  6. 200
  7. 184
  8. 176
  9. 52
  10. 232
  11. 124
  12. 196
  13. 300
  14. 272
  15. 128
  16. 208
  17. 152
  18. 288
  19. 184
  20. 120
  21. 212
  22. 276
  23. 280
  24. 220
  25. 312
  26. 140
  27. 108
  28. 224
  29. 304
  30. 252
  31. 164
  32. 60
  33. 288
  34. 188
  35. 240
  36. 104
  37. 68
  38. 192
  39. 132
  40. 176

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