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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 798 · 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. 1.71 × 4 =
  2. 2.36 × 8 =
  3. 3.12 × 4 =
  4. 4.54 × 4 =
  5. 5.69 × 4 =
  6. 6.26 × 8 =
  7. 7.12 × 8 =
  8. 8.20 × 8 =
  9. 9.62 × 4 =
  10. 10.73 × 4 =
  11. 11.31 × 8 =
  12. 12.23 × 4 =
  13. 13.21 × 8 =
  14. 14.15 × 8 =
  15. 15.24 × 8 =
  16. 16.66 × 4 =
  17. 17.39 × 8 =
  18. 18.25 × 8 =
  19. 19.28 × 8 =
  20. 20.22 × 4 =
  21. 21.27 × 4 =
  22. 22.27 × 8 =
  23. 23.38 × 4 =
  24. 24.28 × 4 =
  25. 25.43 × 4 =
  26. 26.18 × 8 =
  27. 27.51 × 4 =
  28. 28.34 × 4 =
  29. 29.29 × 8 =
  30. 30.14 × 8 =
  31. 31.26 × 4 =
  32. 32.17 × 8 =
  33. 33.24 × 4 =
  34. 34.35 × 8 =
  35. 35.37 × 4 =
  36. 36.34 × 8 =
  37. 37.13 × 4 =
  38. 38.65 × 4 =
  39. 39.14 × 4 =
  40. 40.23 × 8 =

Answer key

  1. 284
  2. 288
  3. 48
  4. 216
  5. 276
  6. 208
  7. 96
  8. 160
  9. 248
  10. 292
  11. 248
  12. 92
  13. 168
  14. 120
  15. 192
  16. 264
  17. 312
  18. 200
  19. 224
  20. 88
  21. 108
  22. 216
  23. 152
  24. 112
  25. 172
  26. 144
  27. 204
  28. 136
  29. 232
  30. 112
  31. 104
  32. 136
  33. 96
  34. 280
  35. 148
  36. 272
  37. 52
  38. 260
  39. 56
  40. 184

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