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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 75 · 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. 1.45 × 4 =
  2. 2.38 × 4 =
  3. 3.36 × 8 =
  4. 4.26 × 4 =
  5. 5.15 × 4 =
  6. 6.18 × 8 =
  7. 7.37 × 8 =
  8. 8.25 × 8 =
  9. 9.69 × 4 =
  10. 10.37 × 4 =
  11. 11.74 × 4 =
  12. 12.51 × 4 =
  13. 13.62 × 4 =
  14. 14.33 × 8 =
  15. 15.21 × 4 =
  16. 16.17 × 8 =
  17. 17.47 × 4 =
  18. 18.14 × 8 =
  19. 19.30 × 8 =
  20. 20.28 × 8 =
  21. 21.27 × 8 =
  22. 22.12 × 8 =
  23. 23.31 × 4 =
  24. 24.39 × 8 =
  25. 25.59 × 4 =
  26. 26.25 × 4 =
  27. 27.13 × 8 =
  28. 28.20 × 8 =
  29. 29.68 × 4 =
  30. 30.36 × 4 =
  31. 31.75 × 4 =
  32. 32.48 × 4 =
  33. 33.63 × 4 =
  34. 34.43 × 4 =
  35. 35.46 × 4 =
  36. 36.29 × 8 =
  37. 37.18 × 4 =
  38. 38.60 × 4 =
  39. 39.26 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 180
  2. 152
  3. 288
  4. 104
  5. 60
  6. 144
  7. 296
  8. 200
  9. 276
  10. 148
  11. 296
  12. 204
  13. 248
  14. 264
  15. 84
  16. 136
  17. 188
  18. 112
  19. 240
  20. 224
  21. 216
  22. 96
  23. 124
  24. 312
  25. 236
  26. 100
  27. 104
  28. 160
  29. 272
  30. 144
  31. 300
  32. 192
  33. 252
  34. 172
  35. 184
  36. 232
  37. 72
  38. 240
  39. 208
  40. 88

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