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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 196 · 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. 1.41 × 4 =
  2. 2.25 × 4 =
  3. 3.36 × 8 =
  4. 4.27 × 4 =
  5. 5.70 × 4 =
  6. 6.19 × 8 =
  7. 7.17 × 8 =
  8. 8.50 × 4 =
  9. 9.14 × 4 =
  10. 10.25 × 8 =
  11. 11.30 × 4 =
  12. 12.38 × 4 =
  13. 13.29 × 4 =
  14. 14.24 × 8 =
  15. 15.74 × 4 =
  16. 16.26 × 8 =
  17. 17.59 × 4 =
  18. 18.53 × 4 =
  19. 19.42 × 4 =
  20. 20.18 × 8 =
  21. 21.34 × 8 =
  22. 22.18 × 4 =
  23. 23.12 × 4 =
  24. 24.33 × 8 =
  25. 25.55 × 4 =
  26. 26.19 × 4 =
  27. 27.72 × 4 =
  28. 28.16 × 4 =
  29. 29.16 × 8 =
  30. 30.23 × 8 =
  31. 31.44 × 4 =
  32. 32.37 × 8 =
  33. 33.73 × 4 =
  34. 34.62 × 4 =
  35. 35.12 × 8 =
  36. 36.29 × 8 =
  37. 37.21 × 8 =
  38. 38.30 × 8 =
  39. 39.13 × 8 =
  40. 40.22 × 8 =

Answer key

  1. 164
  2. 100
  3. 288
  4. 108
  5. 280
  6. 152
  7. 136
  8. 200
  9. 56
  10. 200
  11. 120
  12. 152
  13. 116
  14. 192
  15. 296
  16. 208
  17. 236
  18. 212
  19. 168
  20. 144
  21. 272
  22. 72
  23. 48
  24. 264
  25. 220
  26. 76
  27. 288
  28. 64
  29. 128
  30. 184
  31. 176
  32. 296
  33. 292
  34. 248
  35. 96
  36. 232
  37. 168
  38. 240
  39. 104
  40. 176

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