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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 177 · 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. 1.16 × 4 =
  2. 2.51 × 4 =
  3. 3.62 × 4 =
  4. 4.21 × 8 =
  5. 5.19 × 8 =
  6. 6.15 × 4 =
  7. 7.70 × 4 =
  8. 8.20 × 8 =
  9. 9.52 × 4 =
  10. 10.49 × 4 =
  11. 11.25 × 4 =
  12. 12.71 × 4 =
  13. 13.29 × 8 =
  14. 14.37 × 8 =
  15. 15.39 × 8 =
  16. 16.31 × 4 =
  17. 17.31 × 8 =
  18. 18.14 × 8 =
  19. 19.22 × 8 =
  20. 20.23 × 8 =
  21. 21.75 × 4 =
  22. 22.59 × 4 =
  23. 23.53 × 4 =
  24. 24.30 × 4 =
  25. 25.33 × 4 =
  26. 26.17 × 8 =
  27. 27.15 × 8 =
  28. 28.64 × 4 =
  29. 29.33 × 8 =
  30. 30.38 × 4 =
  31. 31.47 × 4 =
  32. 32.28 × 4 =
  33. 33.36 × 8 =
  34. 34.40 × 4 =
  35. 35.65 × 4 =
  36. 36.17 × 4 =
  37. 37.16 × 8 =
  38. 38.30 × 8 =
  39. 39.36 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 64
  2. 204
  3. 248
  4. 168
  5. 152
  6. 60
  7. 280
  8. 160
  9. 208
  10. 196
  11. 100
  12. 284
  13. 232
  14. 296
  15. 312
  16. 124
  17. 248
  18. 112
  19. 176
  20. 184
  21. 300
  22. 236
  23. 212
  24. 120
  25. 132
  26. 136
  27. 120
  28. 256
  29. 264
  30. 152
  31. 188
  32. 112
  33. 288
  34. 160
  35. 260
  36. 68
  37. 128
  38. 240
  39. 144
  40. 272

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