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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 728 · 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. 1.46 × 4 =
  2. 2.31 × 8 =
  3. 3.63 × 4 =
  4. 4.20 × 4 =
  5. 5.44 × 4 =
  6. 6.50 × 4 =
  7. 7.39 × 4 =
  8. 8.13 × 8 =
  9. 9.29 × 8 =
  10. 10.19 × 8 =
  11. 11.24 × 8 =
  12. 12.19 × 4 =
  13. 13.37 × 8 =
  14. 14.16 × 4 =
  15. 15.29 × 4 =
  16. 16.75 × 4 =
  17. 17.15 × 8 =
  18. 18.64 × 4 =
  19. 19.12 × 4 =
  20. 20.26 × 8 =
  21. 21.27 × 4 =
  22. 22.32 × 8 =
  23. 23.40 × 8 =
  24. 24.54 × 4 =
  25. 25.67 × 4 =
  26. 26.35 × 8 =
  27. 27.68 × 4 =
  28. 28.73 × 4 =
  29. 29.34 × 8 =
  30. 30.23 × 8 =
  31. 31.14 × 8 =
  32. 32.33 × 8 =
  33. 33.55 × 4 =
  34. 34.17 × 8 =
  35. 35.36 × 8 =
  36. 36.28 × 8 =
  37. 37.24 × 4 =
  38. 38.38 × 8 =
  39. 39.23 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 184
  2. 248
  3. 252
  4. 80
  5. 176
  6. 200
  7. 156
  8. 104
  9. 232
  10. 152
  11. 192
  12. 76
  13. 296
  14. 64
  15. 116
  16. 300
  17. 120
  18. 256
  19. 48
  20. 208
  21. 108
  22. 256
  23. 320
  24. 216
  25. 268
  26. 280
  27. 272
  28. 292
  29. 272
  30. 184
  31. 112
  32. 264
  33. 220
  34. 136
  35. 288
  36. 224
  37. 96
  38. 304
  39. 92
  40. 140

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