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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 218 · 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. 1.13 × 4 =
  2. 2.14 × 8 =
  3. 3.38 × 8 =
  4. 4.36 × 4 =
  5. 5.12 × 4 =
  6. 6.47 × 4 =
  7. 7.20 × 8 =
  8. 8.20 × 4 =
  9. 9.30 × 4 =
  10. 10.26 × 8 =
  11. 11.67 × 4 =
  12. 12.29 × 4 =
  13. 13.33 × 8 =
  14. 14.54 × 4 =
  15. 15.40 × 8 =
  16. 16.28 × 8 =
  17. 17.66 × 4 =
  18. 18.64 × 4 =
  19. 19.31 × 8 =
  20. 20.21 × 8 =
  21. 21.24 × 8 =
  22. 22.63 × 4 =
  23. 23.42 × 4 =
  24. 24.37 × 8 =
  25. 25.15 × 4 =
  26. 26.12 × 8 =
  27. 27.24 × 4 =
  28. 28.60 × 4 =
  29. 29.57 × 4 =
  30. 30.14 × 4 =
  31. 31.13 × 8 =
  32. 32.23 × 8 =
  33. 33.31 × 4 =
  34. 34.69 × 4 =
  35. 35.68 × 4 =
  36. 36.46 × 4 =
  37. 37.38 × 4 =
  38. 38.41 × 4 =
  39. 39.27 × 8 =
  40. 40.40 × 4 =

Answer key

  1. 52
  2. 112
  3. 304
  4. 144
  5. 48
  6. 188
  7. 160
  8. 80
  9. 120
  10. 208
  11. 268
  12. 116
  13. 264
  14. 216
  15. 320
  16. 224
  17. 264
  18. 256
  19. 248
  20. 168
  21. 192
  22. 252
  23. 168
  24. 296
  25. 60
  26. 96
  27. 96
  28. 240
  29. 228
  30. 56
  31. 104
  32. 184
  33. 124
  34. 276
  35. 272
  36. 184
  37. 152
  38. 164
  39. 216
  40. 160

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