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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 713 · 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. 1.51 × 4 =
  2. 2.28 × 8 =
  3. 3.67 × 4 =
  4. 4.24 × 8 =
  5. 5.72 × 4 =
  6. 6.75 × 4 =
  7. 7.31 × 8 =
  8. 8.31 × 4 =
  9. 9.46 × 4 =
  10. 10.18 × 4 =
  11. 11.23 × 8 =
  12. 12.38 × 8 =
  13. 13.33 × 4 =
  14. 14.34 × 4 =
  15. 15.57 × 4 =
  16. 16.37 × 4 =
  17. 17.70 × 4 =
  18. 18.22 × 8 =
  19. 19.73 × 4 =
  20. 20.19 × 8 =
  21. 21.18 × 8 =
  22. 22.41 × 4 =
  23. 23.55 × 4 =
  24. 24.66 × 4 =
  25. 25.16 × 8 =
  26. 26.61 × 4 =
  27. 27.20 × 8 =
  28. 28.68 × 4 =
  29. 29.24 × 4 =
  30. 30.40 × 4 =
  31. 31.20 × 4 =
  32. 32.30 × 8 =
  33. 33.34 × 8 =
  34. 34.15 × 8 =
  35. 35.50 × 4 =
  36. 36.74 × 4 =
  37. 37.39 × 8 =
  38. 38.65 × 4 =
  39. 39.32 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 204
  2. 224
  3. 268
  4. 192
  5. 288
  6. 300
  7. 248
  8. 124
  9. 184
  10. 72
  11. 184
  12. 304
  13. 132
  14. 136
  15. 228
  16. 148
  17. 280
  18. 176
  19. 292
  20. 152
  21. 144
  22. 164
  23. 220
  24. 264
  25. 128
  26. 244
  27. 160
  28. 272
  29. 96
  30. 160
  31. 80
  32. 240
  33. 272
  34. 120
  35. 200
  36. 296
  37. 312
  38. 260
  39. 256
  40. 68

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