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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 60 · 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. 1.48 × 4 =
  2. 2.22 × 8 =
  3. 3.39 × 8 =
  4. 4.17 × 8 =
  5. 5.44 × 4 =
  6. 6.20 × 8 =
  7. 7.51 × 4 =
  8. 8.12 × 4 =
  9. 9.17 × 4 =
  10. 10.37 × 4 =
  11. 11.72 × 4 =
  12. 12.27 × 4 =
  13. 13.31 × 8 =
  14. 14.54 × 4 =
  15. 15.71 × 4 =
  16. 16.35 × 4 =
  17. 17.40 × 8 =
  18. 18.29 × 8 =
  19. 19.13 × 8 =
  20. 20.50 × 4 =
  21. 21.36 × 4 =
  22. 22.74 × 4 =
  23. 23.12 × 8 =
  24. 24.25 × 8 =
  25. 25.68 × 4 =
  26. 26.55 × 4 =
  27. 27.43 × 4 =
  28. 28.22 × 4 =
  29. 29.16 × 8 =
  30. 30.35 × 8 =
  31. 31.15 × 8 =
  32. 32.19 × 8 =
  33. 33.30 × 8 =
  34. 34.33 × 8 =
  35. 35.66 × 4 =
  36. 36.21 × 4 =
  37. 37.28 × 8 =
  38. 38.73 × 4 =
  39. 39.37 × 8 =
  40. 40.45 × 4 =

Answer key

  1. 192
  2. 176
  3. 312
  4. 136
  5. 176
  6. 160
  7. 204
  8. 48
  9. 68
  10. 148
  11. 288
  12. 108
  13. 248
  14. 216
  15. 284
  16. 140
  17. 320
  18. 232
  19. 104
  20. 200
  21. 144
  22. 296
  23. 96
  24. 200
  25. 272
  26. 220
  27. 172
  28. 88
  29. 128
  30. 280
  31. 120
  32. 152
  33. 240
  34. 264
  35. 264
  36. 84
  37. 224
  38. 292
  39. 296
  40. 180

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