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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 267 · 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. 2.27 × 4 =
  3. 3.38 × 8 =
  4. 4.38 × 4 =
  5. 5.26 × 8 =
  6. 6.39 × 8 =
  7. 7.37 × 8 =
  8. 8.23 × 8 =
  9. 9.67 × 4 =
  10. 10.17 × 8 =
  11. 11.19 × 8 =
  12. 12.64 × 4 =
  13. 13.63 × 4 =
  14. 14.33 × 8 =
  15. 15.40 × 4 =
  16. 16.21 × 4 =
  17. 17.60 × 4 =
  18. 18.20 × 8 =
  19. 19.51 × 4 =
  20. 20.22 × 4 =
  21. 21.21 × 8 =
  22. 22.50 × 4 =
  23. 23.28 × 8 =
  24. 24.24 × 8 =
  25. 25.33 × 4 =
  26. 26.22 × 8 =
  27. 27.15 × 4 =
  28. 28.59 × 4 =
  29. 29.18 × 4 =
  30. 30.47 × 4 =
  31. 31.18 × 8 =
  32. 32.14 × 8 =
  33. 33.72 × 4 =
  34. 34.75 × 4 =
  35. 35.39 × 4 =
  36. 36.36 × 8 =
  37. 37.69 × 4 =
  38. 38.25 × 8 =
  39. 39.53 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 120
  2. 108
  3. 304
  4. 152
  5. 208
  6. 312
  7. 296
  8. 184
  9. 268
  10. 136
  11. 152
  12. 256
  13. 252
  14. 264
  15. 160
  16. 84
  17. 240
  18. 160
  19. 204
  20. 88
  21. 168
  22. 200
  23. 224
  24. 192
  25. 132
  26. 176
  27. 60
  28. 236
  29. 72
  30. 188
  31. 144
  32. 112
  33. 288
  34. 300
  35. 156
  36. 288
  37. 276
  38. 200
  39. 212
  40. 272

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