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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 811 · 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. 1.12 × 8 =
  2. 2.30 × 8 =
  3. 3.25 × 4 =
  4. 4.72 × 4 =
  5. 5.25 × 8 =
  6. 6.30 × 4 =
  7. 7.29 × 8 =
  8. 8.39 × 8 =
  9. 9.15 × 8 =
  10. 10.40 × 8 =
  11. 11.69 × 4 =
  12. 12.45 × 4 =
  13. 13.27 × 4 =
  14. 14.23 × 8 =
  15. 15.54 × 4 =
  16. 16.53 × 4 =
  17. 17.57 × 4 =
  18. 18.61 × 4 =
  19. 19.52 × 4 =
  20. 20.20 × 4 =
  21. 21.18 × 4 =
  22. 22.14 × 4 =
  23. 23.18 × 8 =
  24. 24.33 × 8 =
  25. 25.17 × 8 =
  26. 26.33 × 4 =
  27. 27.35 × 8 =
  28. 28.68 × 4 =
  29. 29.13 × 8 =
  30. 30.21 × 8 =
  31. 31.31 × 8 =
  32. 32.48 × 4 =
  33. 33.42 × 4 =
  34. 34.71 × 4 =
  35. 35.46 × 4 =
  36. 36.34 × 4 =
  37. 37.43 × 4 =
  38. 38.19 × 8 =
  39. 39.50 × 4 =
  40. 40.39 × 4 =

Answer key

  1. 96
  2. 240
  3. 100
  4. 288
  5. 200
  6. 120
  7. 232
  8. 312
  9. 120
  10. 320
  11. 276
  12. 180
  13. 108
  14. 184
  15. 216
  16. 212
  17. 228
  18. 244
  19. 208
  20. 80
  21. 72
  22. 56
  23. 144
  24. 264
  25. 136
  26. 132
  27. 280
  28. 272
  29. 104
  30. 168
  31. 248
  32. 192
  33. 168
  34. 284
  35. 184
  36. 136
  37. 172
  38. 152
  39. 200
  40. 156

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