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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 471 · 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. 1.16 × 8 =
  2. 2.64 × 4 =
  3. 3.25 × 8 =
  4. 4.27 × 8 =
  5. 5.51 × 4 =
  6. 6.69 × 4 =
  7. 7.13 × 4 =
  8. 8.19 × 8 =
  9. 9.55 × 4 =
  10. 10.26 × 8 =
  11. 11.35 × 8 =
  12. 12.62 × 4 =
  13. 13.20 × 4 =
  14. 14.29 × 8 =
  15. 15.70 × 4 =
  16. 16.32 × 8 =
  17. 17.43 × 4 =
  18. 18.21 × 8 =
  19. 19.30 × 4 =
  20. 20.34 × 4 =
  21. 21.50 × 4 =
  22. 22.37 × 8 =
  23. 23.21 × 4 =
  24. 24.26 × 4 =
  25. 25.22 × 8 =
  26. 26.74 × 4 =
  27. 27.31 × 8 =
  28. 28.33 × 8 =
  29. 29.52 × 4 =
  30. 30.15 × 4 =
  31. 31.13 × 8 =
  32. 32.72 × 4 =
  33. 33.18 × 8 =
  34. 34.24 × 4 =
  35. 35.23 × 4 =
  36. 36.18 × 4 =
  37. 37.19 × 4 =
  38. 38.49 × 4 =
  39. 39.14 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 128
  2. 256
  3. 200
  4. 216
  5. 204
  6. 276
  7. 52
  8. 152
  9. 220
  10. 208
  11. 280
  12. 248
  13. 80
  14. 232
  15. 280
  16. 256
  17. 172
  18. 168
  19. 120
  20. 136
  21. 200
  22. 296
  23. 84
  24. 104
  25. 176
  26. 296
  27. 248
  28. 264
  29. 208
  30. 60
  31. 104
  32. 288
  33. 144
  34. 96
  35. 92
  36. 72
  37. 76
  38. 196
  39. 56
  40. 260

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