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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 319 · 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. 1.51 × 4 =
  2. 2.29 × 8 =
  3. 3.54 × 4 =
  4. 4.18 × 8 =
  5. 5.26 × 4 =
  6. 6.14 × 4 =
  7. 7.40 × 8 =
  8. 8.30 × 8 =
  9. 9.18 × 4 =
  10. 10.26 × 8 =
  11. 11.28 × 4 =
  12. 12.37 × 8 =
  13. 13.70 × 4 =
  14. 14.23 × 8 =
  15. 15.35 × 8 =
  16. 16.55 × 4 =
  17. 17.73 × 4 =
  18. 18.33 × 8 =
  19. 19.35 × 4 =
  20. 20.13 × 4 =
  21. 21.69 × 4 =
  22. 22.67 × 4 =
  23. 23.74 × 4 =
  24. 24.19 × 8 =
  25. 25.72 × 4 =
  26. 26.27 × 8 =
  27. 27.31 × 8 =
  28. 28.58 × 4 =
  29. 29.17 × 8 =
  30. 30.38 × 8 =
  31. 31.36 × 4 =
  32. 32.40 × 4 =
  33. 33.27 × 4 =
  34. 34.49 × 4 =
  35. 35.16 × 8 =
  36. 36.65 × 4 =
  37. 37.22 × 8 =
  38. 38.44 × 4 =
  39. 39.24 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 204
  2. 232
  3. 216
  4. 144
  5. 104
  6. 56
  7. 320
  8. 240
  9. 72
  10. 208
  11. 112
  12. 296
  13. 280
  14. 184
  15. 280
  16. 220
  17. 292
  18. 264
  19. 140
  20. 52
  21. 276
  22. 268
  23. 296
  24. 152
  25. 288
  26. 216
  27. 248
  28. 232
  29. 136
  30. 304
  31. 144
  32. 160
  33. 108
  34. 196
  35. 128
  36. 260
  37. 176
  38. 176
  39. 192
  40. 160

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