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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 458 · 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. 1.40 × 8 =
  2. 2.24 × 8 =
  3. 3.42 × 4 =
  4. 4.25 × 8 =
  5. 5.58 × 4 =
  6. 6.37 × 8 =
  7. 7.44 × 4 =
  8. 8.46 × 4 =
  9. 9.33 × 4 =
  10. 10.75 × 4 =
  11. 11.34 × 4 =
  12. 12.23 × 8 =
  13. 13.64 × 4 =
  14. 14.20 × 8 =
  15. 15.59 × 4 =
  16. 16.39 × 8 =
  17. 17.53 × 4 =
  18. 18.38 × 4 =
  19. 19.27 × 8 =
  20. 20.17 × 4 =
  21. 21.38 × 8 =
  22. 22.13 × 8 =
  23. 23.19 × 8 =
  24. 24.56 × 4 =
  25. 25.39 × 4 =
  26. 26.72 × 4 =
  27. 27.37 × 4 =
  28. 28.19 × 4 =
  29. 29.33 × 8 =
  30. 30.12 × 4 =
  31. 31.27 × 4 =
  32. 32.28 × 8 =
  33. 33.32 × 4 =
  34. 34.14 × 4 =
  35. 35.32 × 8 =
  36. 36.12 × 8 =
  37. 37.36 × 8 =
  38. 38.61 × 4 =
  39. 39.49 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 320
  2. 192
  3. 168
  4. 200
  5. 232
  6. 296
  7. 176
  8. 184
  9. 132
  10. 300
  11. 136
  12. 184
  13. 256
  14. 160
  15. 236
  16. 312
  17. 212
  18. 152
  19. 216
  20. 68
  21. 304
  22. 104
  23. 152
  24. 224
  25. 156
  26. 288
  27. 148
  28. 76
  29. 264
  30. 48
  31. 108
  32. 224
  33. 128
  34. 56
  35. 256
  36. 96
  37. 288
  38. 244
  39. 196
  40. 240

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