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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 675 · 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. 1.27 × 4 =
  2. 2.24 × 4 =
  3. 3.55 × 4 =
  4. 4.47 × 4 =
  5. 5.29 × 4 =
  6. 6.14 × 8 =
  7. 7.51 × 4 =
  8. 8.32 × 8 =
  9. 9.18 × 8 =
  10. 10.20 × 4 =
  11. 11.36 × 4 =
  12. 12.21 × 4 =
  13. 13.59 × 4 =
  14. 14.23 × 8 =
  15. 15.15 × 8 =
  16. 16.44 × 4 =
  17. 17.28 × 4 =
  18. 18.43 × 4 =
  19. 19.12 × 8 =
  20. 20.16 × 4 =
  21. 21.12 × 4 =
  22. 22.17 × 8 =
  23. 23.35 × 8 =
  24. 24.37 × 8 =
  25. 25.42 × 4 =
  26. 26.31 × 4 =
  27. 27.13 × 8 =
  28. 28.34 × 8 =
  29. 29.33 × 8 =
  30. 30.54 × 4 =
  31. 31.25 × 4 =
  32. 32.20 × 8 =
  33. 33.40 × 8 =
  34. 34.25 × 8 =
  35. 35.38 × 8 =
  36. 36.28 × 8 =
  37. 37.26 × 8 =
  38. 38.58 × 4 =
  39. 39.34 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 108
  2. 96
  3. 220
  4. 188
  5. 116
  6. 112
  7. 204
  8. 256
  9. 144
  10. 80
  11. 144
  12. 84
  13. 236
  14. 184
  15. 120
  16. 176
  17. 112
  18. 172
  19. 96
  20. 64
  21. 48
  22. 136
  23. 280
  24. 296
  25. 168
  26. 124
  27. 104
  28. 272
  29. 264
  30. 216
  31. 100
  32. 160
  33. 320
  34. 200
  35. 304
  36. 224
  37. 208
  38. 232
  39. 136
  40. 148

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