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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 519 · 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. 1.30 × 4 =
  2. 2.51 × 4 =
  3. 3.32 × 4 =
  4. 4.59 × 4 =
  5. 5.36 × 8 =
  6. 6.39 × 4 =
  7. 7.48 × 4 =
  8. 8.60 × 4 =
  9. 9.22 × 4 =
  10. 10.61 × 4 =
  11. 11.37 × 8 =
  12. 12.74 × 4 =
  13. 13.22 × 8 =
  14. 14.14 × 4 =
  15. 15.69 × 4 =
  16. 16.16 × 4 =
  17. 17.26 × 8 =
  18. 18.20 × 4 =
  19. 19.75 × 4 =
  20. 20.21 × 4 =
  21. 21.12 × 8 =
  22. 22.52 × 4 =
  23. 23.30 × 8 =
  24. 24.19 × 4 =
  25. 25.25 × 8 =
  26. 26.23 × 8 =
  27. 27.73 × 4 =
  28. 28.17 × 8 =
  29. 29.67 × 4 =
  30. 30.42 × 4 =
  31. 31.19 × 8 =
  32. 32.40 × 8 =
  33. 33.24 × 8 =
  34. 34.41 × 4 =
  35. 35.31 × 4 =
  36. 36.25 × 4 =
  37. 37.65 × 4 =
  38. 38.20 × 8 =
  39. 39.15 × 8 =
  40. 40.49 × 4 =

Answer key

  1. 120
  2. 204
  3. 128
  4. 236
  5. 288
  6. 156
  7. 192
  8. 240
  9. 88
  10. 244
  11. 296
  12. 296
  13. 176
  14. 56
  15. 276
  16. 64
  17. 208
  18. 80
  19. 300
  20. 84
  21. 96
  22. 208
  23. 240
  24. 76
  25. 200
  26. 184
  27. 292
  28. 136
  29. 268
  30. 168
  31. 152
  32. 320
  33. 192
  34. 164
  35. 124
  36. 100
  37. 260
  38. 160
  39. 120
  40. 196

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