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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 372 · 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. 1.61 × 4 =
  2. 2.26 × 8 =
  3. 3.28 × 4 =
  4. 4.29 × 4 =
  5. 5.15 × 8 =
  6. 6.75 × 4 =
  7. 7.16 × 4 =
  8. 8.40 × 8 =
  9. 9.13 × 8 =
  10. 10.31 × 4 =
  11. 11.65 × 4 =
  12. 12.74 × 4 =
  13. 13.27 × 8 =
  14. 14.19 × 8 =
  15. 15.70 × 4 =
  16. 16.33 × 8 =
  17. 17.66 × 4 =
  18. 18.29 × 8 =
  19. 19.18 × 4 =
  20. 20.41 × 4 =
  21. 21.20 × 8 =
  22. 22.31 × 8 =
  23. 23.17 × 8 =
  24. 24.39 × 4 =
  25. 25.35 × 8 =
  26. 26.59 × 4 =
  27. 27.24 × 4 =
  28. 28.21 × 8 =
  29. 29.46 × 4 =
  30. 30.38 × 8 =
  31. 31.16 × 8 =
  32. 32.26 × 4 =
  33. 33.33 × 4 =
  34. 34.71 × 4 =
  35. 35.35 × 4 =
  36. 36.32 × 8 =
  37. 37.12 × 8 =
  38. 38.37 × 8 =
  39. 39.53 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 244
  2. 208
  3. 112
  4. 116
  5. 120
  6. 300
  7. 64
  8. 320
  9. 104
  10. 124
  11. 260
  12. 296
  13. 216
  14. 152
  15. 280
  16. 264
  17. 264
  18. 232
  19. 72
  20. 164
  21. 160
  22. 248
  23. 136
  24. 156
  25. 280
  26. 236
  27. 96
  28. 168
  29. 184
  30. 304
  31. 128
  32. 104
  33. 132
  34. 284
  35. 140
  36. 256
  37. 96
  38. 296
  39. 212
  40. 200

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