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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 530 · 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. 1.73 × 4 =
  2. 2.12 × 8 =
  3. 3.29 × 4 =
  4. 4.68 × 4 =
  5. 5.65 × 4 =
  6. 6.19 × 4 =
  7. 7.36 × 8 =
  8. 8.13 × 8 =
  9. 9.20 × 4 =
  10. 10.24 × 4 =
  11. 11.18 × 4 =
  12. 12.47 × 4 =
  13. 13.30 × 8 =
  14. 14.43 × 4 =
  15. 15.19 × 8 =
  16. 16.66 × 4 =
  17. 17.26 × 4 =
  18. 18.67 × 4 =
  19. 19.71 × 4 =
  20. 20.23 × 8 =
  21. 21.36 × 4 =
  22. 22.21 × 4 =
  23. 23.41 × 4 =
  24. 24.74 × 4 =
  25. 25.75 × 4 =
  26. 26.21 × 8 =
  27. 27.20 × 8 =
  28. 28.22 × 8 =
  29. 29.24 × 8 =
  30. 30.70 × 4 =
  31. 31.35 × 4 =
  32. 32.31 × 4 =
  33. 33.27 × 4 =
  34. 34.58 × 4 =
  35. 35.38 × 8 =
  36. 36.32 × 8 =
  37. 37.25 × 4 =
  38. 38.32 × 4 =
  39. 39.15 × 4 =
  40. 40.59 × 4 =

Answer key

  1. 292
  2. 96
  3. 116
  4. 272
  5. 260
  6. 76
  7. 288
  8. 104
  9. 80
  10. 96
  11. 72
  12. 188
  13. 240
  14. 172
  15. 152
  16. 264
  17. 104
  18. 268
  19. 284
  20. 184
  21. 144
  22. 84
  23. 164
  24. 296
  25. 300
  26. 168
  27. 160
  28. 176
  29. 192
  30. 280
  31. 140
  32. 124
  33. 108
  34. 232
  35. 304
  36. 256
  37. 100
  38. 128
  39. 60
  40. 236

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