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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 82 · 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. 1.27 × 4 =
  2. 2.71 × 4 =
  3. 3.26 × 4 =
  4. 4.15 × 8 =
  5. 5.45 × 4 =
  6. 6.26 × 8 =
  7. 7.35 × 8 =
  8. 8.66 × 4 =
  9. 9.38 × 8 =
  10. 10.23 × 8 =
  11. 11.40 × 4 =
  12. 12.28 × 4 =
  13. 13.17 × 4 =
  14. 14.36 × 4 =
  15. 15.21 × 8 =
  16. 16.69 × 4 =
  17. 17.16 × 8 =
  18. 18.19 × 8 =
  19. 19.59 × 4 =
  20. 20.34 × 4 =
  21. 21.31 × 4 =
  22. 22.37 × 4 =
  23. 23.52 × 4 =
  24. 24.43 × 4 =
  25. 25.18 × 8 =
  26. 26.32 × 8 =
  27. 27.47 × 4 =
  28. 28.55 × 4 =
  29. 29.49 × 4 =
  30. 30.30 × 4 =
  31. 31.22 × 8 =
  32. 32.36 × 8 =
  33. 33.50 × 4 =
  34. 34.38 × 4 =
  35. 35.25 × 8 =
  36. 36.24 × 4 =
  37. 37.67 × 4 =
  38. 38.46 × 4 =
  39. 39.24 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 108
  2. 284
  3. 104
  4. 120
  5. 180
  6. 208
  7. 280
  8. 264
  9. 304
  10. 184
  11. 160
  12. 112
  13. 68
  14. 144
  15. 168
  16. 276
  17. 128
  18. 152
  19. 236
  20. 136
  21. 124
  22. 148
  23. 208
  24. 172
  25. 144
  26. 256
  27. 188
  28. 220
  29. 196
  30. 120
  31. 176
  32. 288
  33. 200
  34. 152
  35. 200
  36. 96
  37. 268
  38. 184
  39. 192
  40. 292

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