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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 400 · 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. 1.13 × 8 =
  2. 2.27 × 8 =
  3. 3.41 × 4 =
  4. 4.18 × 8 =
  5. 5.32 × 8 =
  6. 6.36 × 8 =
  7. 7.28 × 8 =
  8. 8.22 × 8 =
  9. 9.16 × 8 =
  10. 10.39 × 8 =
  11. 11.14 × 8 =
  12. 12.67 × 4 =
  13. 13.17 × 8 =
  14. 14.19 × 8 =
  15. 15.24 × 4 =
  16. 16.29 × 8 =
  17. 17.62 × 4 =
  18. 18.43 × 4 =
  19. 19.38 × 8 =
  20. 20.25 × 8 =
  21. 21.23 × 8 =
  22. 22.60 × 4 =
  23. 23.31 × 8 =
  24. 24.73 × 4 =
  25. 25.15 × 8 =
  26. 26.16 × 4 =
  27. 27.52 × 4 =
  28. 28.45 × 4 =
  29. 29.35 × 8 =
  30. 30.29 × 4 =
  31. 31.12 × 8 =
  32. 32.39 × 4 =
  33. 33.20 × 8 =
  34. 34.74 × 4 =
  35. 35.34 × 8 =
  36. 36.63 × 4 =
  37. 37.13 × 4 =
  38. 38.24 × 8 =
  39. 39.69 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 104
  2. 216
  3. 164
  4. 144
  5. 256
  6. 288
  7. 224
  8. 176
  9. 128
  10. 312
  11. 112
  12. 268
  13. 136
  14. 152
  15. 96
  16. 232
  17. 248
  18. 172
  19. 304
  20. 200
  21. 184
  22. 240
  23. 248
  24. 292
  25. 120
  26. 64
  27. 208
  28. 180
  29. 280
  30. 116
  31. 96
  32. 156
  33. 160
  34. 296
  35. 272
  36. 252
  37. 52
  38. 192
  39. 276
  40. 204

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