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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 212 · 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. 1.49 × 4 =
  2. 2.12 × 4 =
  3. 3.24 × 8 =
  4. 4.17 × 8 =
  5. 5.40 × 8 =
  6. 6.16 × 8 =
  7. 7.42 × 4 =
  8. 8.23 × 8 =
  9. 9.31 × 8 =
  10. 10.37 × 4 =
  11. 11.48 × 4 =
  12. 12.55 × 4 =
  13. 13.15 × 8 =
  14. 14.20 × 8 =
  15. 15.25 × 8 =
  16. 16.68 × 4 =
  17. 17.34 × 8 =
  18. 18.28 × 4 =
  19. 19.27 × 4 =
  20. 20.38 × 4 =
  21. 21.21 × 4 =
  22. 22.32 × 8 =
  23. 23.34 × 4 =
  24. 24.17 × 4 =
  25. 25.73 × 4 =
  26. 26.69 × 4 =
  27. 27.21 × 8 =
  28. 28.20 × 4 =
  29. 29.19 × 8 =
  30. 30.28 × 8 =
  31. 31.30 × 8 =
  32. 32.33 × 8 =
  33. 33.40 × 4 =
  34. 34.36 × 4 =
  35. 35.38 × 8 =
  36. 36.15 × 4 =
  37. 37.13 × 4 =
  38. 38.29 × 8 =
  39. 39.75 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 196
  2. 48
  3. 192
  4. 136
  5. 320
  6. 128
  7. 168
  8. 184
  9. 248
  10. 148
  11. 192
  12. 220
  13. 120
  14. 160
  15. 200
  16. 272
  17. 272
  18. 112
  19. 108
  20. 152
  21. 84
  22. 256
  23. 136
  24. 68
  25. 292
  26. 276
  27. 168
  28. 80
  29. 152
  30. 224
  31. 240
  32. 264
  33. 160
  34. 144
  35. 304
  36. 60
  37. 52
  38. 232
  39. 300
  40. 208

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