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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 257 · 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. 1.20 × 4 =
  2. 2.71 × 4 =
  3. 3.68 × 4 =
  4. 4.36 × 4 =
  5. 5.21 × 4 =
  6. 6.19 × 8 =
  7. 7.58 × 4 =
  8. 8.13 × 4 =
  9. 9.29 × 8 =
  10. 10.70 × 4 =
  11. 11.13 × 8 =
  12. 12.57 × 4 =
  13. 13.41 × 4 =
  14. 14.34 × 8 =
  15. 15.43 × 4 =
  16. 16.18 × 8 =
  17. 17.25 × 8 =
  18. 18.38 × 8 =
  19. 19.23 × 8 =
  20. 20.59 × 4 =
  21. 21.12 × 8 =
  22. 22.23 × 4 =
  23. 23.28 × 4 =
  24. 24.26 × 8 =
  25. 25.67 × 4 =
  26. 26.39 × 8 =
  27. 27.49 × 4 =
  28. 28.33 × 4 =
  29. 29.32 × 8 =
  30. 30.14 × 8 =
  31. 31.55 × 4 =
  32. 32.28 × 8 =
  33. 33.54 × 4 =
  34. 34.30 × 4 =
  35. 35.37 × 8 =
  36. 36.19 × 4 =
  37. 37.30 × 8 =
  38. 38.27 × 4 =
  39. 39.33 × 8 =
  40. 40.32 × 4 =

Answer key

  1. 80
  2. 284
  3. 272
  4. 144
  5. 84
  6. 152
  7. 232
  8. 52
  9. 232
  10. 280
  11. 104
  12. 228
  13. 164
  14. 272
  15. 172
  16. 144
  17. 200
  18. 304
  19. 184
  20. 236
  21. 96
  22. 92
  23. 112
  24. 208
  25. 268
  26. 312
  27. 196
  28. 132
  29. 256
  30. 112
  31. 220
  32. 224
  33. 216
  34. 120
  35. 296
  36. 76
  37. 240
  38. 108
  39. 264
  40. 128

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