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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 602 · 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. 1.29 × 4 =
  2. 2.44 × 4 =
  3. 3.16 × 8 =
  4. 4.14 × 8 =
  5. 5.50 × 4 =
  6. 6.19 × 8 =
  7. 7.22 × 8 =
  8. 8.23 × 8 =
  9. 9.17 × 4 =
  10. 10.14 × 4 =
  11. 11.38 × 4 =
  12. 12.33 × 8 =
  13. 13.12 × 4 =
  14. 14.39 × 4 =
  15. 15.25 × 4 =
  16. 16.43 × 4 =
  17. 17.12 × 8 =
  18. 18.35 × 8 =
  19. 19.75 × 4 =
  20. 20.24 × 8 =
  21. 21.71 × 4 =
  22. 22.32 × 8 =
  23. 23.38 × 8 =
  24. 24.20 × 4 =
  25. 25.20 × 8 =
  26. 26.23 × 4 =
  27. 27.57 × 4 =
  28. 28.52 × 4 =
  29. 29.69 × 4 =
  30. 30.39 × 8 =
  31. 31.15 × 8 =
  32. 32.40 × 4 =
  33. 33.29 × 8 =
  34. 34.17 × 8 =
  35. 35.70 × 4 =
  36. 36.31 × 4 =
  37. 37.16 × 4 =
  38. 38.51 × 4 =
  39. 39.46 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 116
  2. 176
  3. 128
  4. 112
  5. 200
  6. 152
  7. 176
  8. 184
  9. 68
  10. 56
  11. 152
  12. 264
  13. 48
  14. 156
  15. 100
  16. 172
  17. 96
  18. 280
  19. 300
  20. 192
  21. 284
  22. 256
  23. 304
  24. 80
  25. 160
  26. 92
  27. 228
  28. 208
  29. 276
  30. 312
  31. 120
  32. 160
  33. 232
  34. 136
  35. 280
  36. 124
  37. 64
  38. 204
  39. 184
  40. 268

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