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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 380 · 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. 1.23 × 4 =
  2. 2.41 × 4 =
  3. 3.34 × 8 =
  4. 4.17 × 8 =
  5. 5.31 × 8 =
  6. 6.21 × 8 =
  7. 7.35 × 8 =
  8. 8.25 × 8 =
  9. 9.23 × 8 =
  10. 10.40 × 8 =
  11. 11.26 × 8 =
  12. 12.12 × 8 =
  13. 13.62 × 4 =
  14. 14.27 × 8 =
  15. 15.14 × 4 =
  16. 16.13 × 8 =
  17. 17.71 × 4 =
  18. 18.66 × 4 =
  19. 19.34 × 4 =
  20. 20.51 × 4 =
  21. 21.68 × 4 =
  22. 22.63 × 4 =
  23. 23.59 × 4 =
  24. 24.15 × 8 =
  25. 25.19 × 8 =
  26. 26.74 × 4 =
  27. 27.60 × 4 =
  28. 28.38 × 8 =
  29. 29.38 × 4 =
  30. 30.46 × 4 =
  31. 31.26 × 4 =
  32. 32.64 × 4 =
  33. 33.29 × 8 =
  34. 34.45 × 4 =
  35. 35.20 × 8 =
  36. 36.12 × 4 =
  37. 37.22 × 8 =
  38. 38.17 × 4 =
  39. 39.31 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 92
  2. 164
  3. 272
  4. 136
  5. 248
  6. 168
  7. 280
  8. 200
  9. 184
  10. 320
  11. 208
  12. 96
  13. 248
  14. 216
  15. 56
  16. 104
  17. 284
  18. 264
  19. 136
  20. 204
  21. 272
  22. 252
  23. 236
  24. 120
  25. 152
  26. 296
  27. 240
  28. 304
  29. 152
  30. 184
  31. 104
  32. 256
  33. 232
  34. 180
  35. 160
  36. 48
  37. 176
  38. 68
  39. 124
  40. 112

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