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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 175 · 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. 1.73 × 4 =
  2. 2.32 × 8 =
  3. 3.36 × 8 =
  4. 4.22 × 8 =
  5. 5.22 × 4 =
  6. 6.31 × 8 =
  7. 7.28 × 8 =
  8. 8.18 × 8 =
  9. 9.13 × 8 =
  10. 10.19 × 4 =
  11. 11.27 × 4 =
  12. 12.15 × 4 =
  13. 13.52 × 4 =
  14. 14.47 × 4 =
  15. 15.38 × 4 =
  16. 16.21 × 8 =
  17. 17.19 × 8 =
  18. 18.39 × 4 =
  19. 19.32 × 4 =
  20. 20.40 × 8 =
  21. 21.43 × 4 =
  22. 22.34 × 8 =
  23. 23.14 × 8 =
  24. 24.24 × 4 =
  25. 25.68 × 4 =
  26. 26.36 × 4 =
  27. 27.25 × 8 =
  28. 28.48 × 4 =
  29. 29.59 × 4 =
  30. 30.29 × 8 =
  31. 31.46 × 4 =
  32. 32.72 × 4 =
  33. 33.20 × 8 =
  34. 34.15 × 8 =
  35. 35.55 × 4 =
  36. 36.49 × 4 =
  37. 37.35 × 8 =
  38. 38.40 × 4 =
  39. 39.17 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 292
  2. 256
  3. 288
  4. 176
  5. 88
  6. 248
  7. 224
  8. 144
  9. 104
  10. 76
  11. 108
  12. 60
  13. 208
  14. 188
  15. 152
  16. 168
  17. 152
  18. 156
  19. 128
  20. 320
  21. 172
  22. 272
  23. 112
  24. 96
  25. 272
  26. 144
  27. 200
  28. 192
  29. 236
  30. 232
  31. 184
  32. 288
  33. 160
  34. 120
  35. 220
  36. 196
  37. 280
  38. 160
  39. 136
  40. 96

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