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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 808 · 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. 1.53 × 4 =
  2. 2.28 × 8 =
  3. 3.12 × 8 =
  4. 4.36 × 8 =
  5. 5.19 × 4 =
  6. 6.26 × 8 =
  7. 7.44 × 4 =
  8. 8.29 × 4 =
  9. 9.35 × 8 =
  10. 10.21 × 4 =
  11. 11.13 × 4 =
  12. 12.61 × 4 =
  13. 13.69 × 4 =
  14. 14.23 × 8 =
  15. 15.12 × 4 =
  16. 16.39 × 8 =
  17. 17.19 × 8 =
  18. 18.58 × 4 =
  19. 19.71 × 4 =
  20. 20.66 × 4 =
  21. 21.54 × 4 =
  22. 22.37 × 8 =
  23. 23.15 × 8 =
  24. 24.56 × 4 =
  25. 25.31 × 8 =
  26. 26.49 × 4 =
  27. 27.21 × 8 =
  28. 28.16 × 4 =
  29. 29.27 × 8 =
  30. 30.43 × 4 =
  31. 31.70 × 4 =
  32. 32.32 × 8 =
  33. 33.13 × 8 =
  34. 34.15 × 4 =
  35. 35.37 × 4 =
  36. 36.25 × 4 =
  37. 37.34 × 4 =
  38. 38.41 × 4 =
  39. 39.33 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 212
  2. 224
  3. 96
  4. 288
  5. 76
  6. 208
  7. 176
  8. 116
  9. 280
  10. 84
  11. 52
  12. 244
  13. 276
  14. 184
  15. 48
  16. 312
  17. 152
  18. 232
  19. 284
  20. 264
  21. 216
  22. 296
  23. 120
  24. 224
  25. 248
  26. 196
  27. 168
  28. 64
  29. 216
  30. 172
  31. 280
  32. 256
  33. 104
  34. 60
  35. 148
  36. 100
  37. 136
  38. 164
  39. 264
  40. 144

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