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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 172 · 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. 1.25 × 8 =
  2. 2.50 × 4 =
  3. 3.36 × 4 =
  4. 4.63 × 4 =
  5. 5.26 × 4 =
  6. 6.13 × 8 =
  7. 7.75 × 4 =
  8. 8.16 × 8 =
  9. 9.22 × 4 =
  10. 10.52 × 4 =
  11. 11.39 × 8 =
  12. 12.16 × 4 =
  13. 13.17 × 8 =
  14. 14.37 × 8 =
  15. 15.18 × 8 =
  16. 16.33 × 8 =
  17. 17.27 × 8 =
  18. 18.20 × 8 =
  19. 19.24 × 8 =
  20. 20.18 × 4 =
  21. 21.19 × 8 =
  22. 22.31 × 4 =
  23. 23.36 × 8 =
  24. 24.69 × 4 =
  25. 25.66 × 4 =
  26. 26.34 × 8 =
  27. 27.22 × 8 =
  28. 28.59 × 4 =
  29. 29.46 × 4 =
  30. 30.19 × 4 =
  31. 31.64 × 4 =
  32. 32.23 × 8 =
  33. 33.32 × 8 =
  34. 34.54 × 4 =
  35. 35.31 × 8 =
  36. 36.23 × 4 =
  37. 37.60 × 4 =
  38. 38.74 × 4 =
  39. 39.37 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 200
  2. 200
  3. 144
  4. 252
  5. 104
  6. 104
  7. 300
  8. 128
  9. 88
  10. 208
  11. 312
  12. 64
  13. 136
  14. 296
  15. 144
  16. 264
  17. 216
  18. 160
  19. 192
  20. 72
  21. 152
  22. 124
  23. 288
  24. 276
  25. 264
  26. 272
  27. 176
  28. 236
  29. 184
  30. 76
  31. 256
  32. 184
  33. 256
  34. 216
  35. 248
  36. 92
  37. 240
  38. 296
  39. 148
  40. 140

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