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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 626 · 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. 2.23 × 8 =
  3. 3.20 × 4 =
  4. 4.27 × 4 =
  5. 5.37 × 8 =
  6. 6.31 × 8 =
  7. 7.27 × 8 =
  8. 8.24 × 8 =
  9. 9.61 × 4 =
  10. 10.34 × 8 =
  11. 11.32 × 4 =
  12. 12.19 × 4 =
  13. 13.14 × 8 =
  14. 14.70 × 4 =
  15. 15.71 × 4 =
  16. 16.45 × 4 =
  17. 17.40 × 4 =
  18. 18.15 × 8 =
  19. 19.13 × 8 =
  20. 20.72 × 4 =
  21. 21.35 × 8 =
  22. 22.32 × 8 =
  23. 23.30 × 4 =
  24. 24.17 × 8 =
  25. 25.64 × 4 =
  26. 26.23 × 4 =
  27. 27.14 × 4 =
  28. 28.18 × 8 =
  29. 29.43 × 4 =
  30. 30.21 × 8 =
  31. 31.52 × 4 =
  32. 32.33 × 8 =
  33. 33.48 × 4 =
  34. 34.54 × 4 =
  35. 35.36 × 8 =
  36. 36.38 × 4 =
  37. 37.38 × 8 =
  38. 38.12 × 8 =
  39. 39.50 × 4 =
  40. 40.56 × 4 =

Answer key

  1. 184
  2. 184
  3. 80
  4. 108
  5. 296
  6. 248
  7. 216
  8. 192
  9. 244
  10. 272
  11. 128
  12. 76
  13. 112
  14. 280
  15. 284
  16. 180
  17. 160
  18. 120
  19. 104
  20. 288
  21. 280
  22. 256
  23. 120
  24. 136
  25. 256
  26. 92
  27. 56
  28. 144
  29. 172
  30. 168
  31. 208
  32. 264
  33. 192
  34. 216
  35. 288
  36. 152
  37. 304
  38. 96
  39. 200
  40. 224

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