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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 570 · 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. 1.15 × 8 =
  2. 2.56 × 4 =
  3. 3.64 × 4 =
  4. 4.35 × 8 =
  5. 5.43 × 4 =
  6. 6.47 × 4 =
  7. 7.16 × 8 =
  8. 8.12 × 8 =
  9. 9.51 × 4 =
  10. 10.37 × 8 =
  11. 11.23 × 8 =
  12. 12.25 × 8 =
  13. 13.27 × 4 =
  14. 14.38 × 8 =
  15. 15.37 × 4 =
  16. 16.14 × 4 =
  17. 17.18 × 8 =
  18. 18.20 × 8 =
  19. 19.32 × 8 =
  20. 20.41 × 4 =
  21. 21.60 × 4 =
  22. 22.24 × 4 =
  23. 23.21 × 4 =
  24. 24.49 × 4 =
  25. 25.40 × 4 =
  26. 26.42 × 4 =
  27. 27.36 × 4 =
  28. 28.39 × 8 =
  29. 29.46 × 4 =
  30. 30.44 × 4 =
  31. 31.53 × 4 =
  32. 32.30 × 4 =
  33. 33.14 × 8 =
  34. 34.58 × 4 =
  35. 35.19 × 8 =
  36. 36.40 × 8 =
  37. 37.36 × 8 =
  38. 38.33 × 8 =
  39. 39.69 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 120
  2. 224
  3. 256
  4. 280
  5. 172
  6. 188
  7. 128
  8. 96
  9. 204
  10. 296
  11. 184
  12. 200
  13. 108
  14. 304
  15. 148
  16. 56
  17. 144
  18. 160
  19. 256
  20. 164
  21. 240
  22. 96
  23. 84
  24. 196
  25. 160
  26. 168
  27. 144
  28. 312
  29. 184
  30. 176
  31. 212
  32. 120
  33. 112
  34. 232
  35. 152
  36. 320
  37. 288
  38. 264
  39. 276
  40. 248

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