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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 718 · 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. 1.39 × 8 =
  2. 2.24 × 8 =
  3. 3.74 × 4 =
  4. 4.62 × 4 =
  5. 5.55 × 4 =
  6. 6.51 × 4 =
  7. 7.26 × 8 =
  8. 8.30 × 8 =
  9. 9.28 × 8 =
  10. 10.18 × 8 =
  11. 11.29 × 4 =
  12. 12.66 × 4 =
  13. 13.45 × 4 =
  14. 14.32 × 4 =
  15. 15.13 × 4 =
  16. 16.72 × 4 =
  17. 17.12 × 8 =
  18. 18.64 × 4 =
  19. 19.38 × 4 =
  20. 20.22 × 8 =
  21. 21.58 × 4 =
  22. 22.28 × 4 =
  23. 23.53 × 4 =
  24. 24.38 × 8 =
  25. 25.17 × 8 =
  26. 26.15 × 4 =
  27. 27.34 × 8 =
  28. 28.30 × 4 =
  29. 29.70 × 4 =
  30. 30.40 × 8 =
  31. 31.67 × 4 =
  32. 32.59 × 4 =
  33. 33.31 × 8 =
  34. 34.33 × 4 =
  35. 35.48 × 4 =
  36. 36.32 × 8 =
  37. 37.14 × 8 =
  38. 38.35 × 4 =
  39. 39.19 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 312
  2. 192
  3. 296
  4. 248
  5. 220
  6. 204
  7. 208
  8. 240
  9. 224
  10. 144
  11. 116
  12. 264
  13. 180
  14. 128
  15. 52
  16. 288
  17. 96
  18. 256
  19. 152
  20. 176
  21. 232
  22. 112
  23. 212
  24. 304
  25. 136
  26. 60
  27. 272
  28. 120
  29. 280
  30. 320
  31. 268
  32. 236
  33. 248
  34. 132
  35. 192
  36. 256
  37. 112
  38. 140
  39. 152
  40. 68

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