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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 803 · 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. 1.27 × 8 =
  2. 2.62 × 4 =
  3. 3.40 × 4 =
  4. 4.15 × 8 =
  5. 5.71 × 4 =
  6. 6.48 × 4 =
  7. 7.12 × 8 =
  8. 8.20 × 8 =
  9. 9.61 × 4 =
  10. 10.14 × 8 =
  11. 11.13 × 8 =
  12. 12.34 × 4 =
  13. 13.14 × 4 =
  14. 14.50 × 4 =
  15. 15.29 × 8 =
  16. 16.51 × 4 =
  17. 17.74 × 4 =
  18. 18.18 × 4 =
  19. 19.42 × 4 =
  20. 20.16 × 4 =
  21. 21.30 × 8 =
  22. 22.46 × 4 =
  23. 23.24 × 8 =
  24. 24.43 × 4 =
  25. 25.23 × 8 =
  26. 26.21 × 8 =
  27. 27.38 × 4 =
  28. 28.57 × 4 =
  29. 29.33 × 8 =
  30. 30.20 × 4 =
  31. 31.19 × 8 =
  32. 32.26 × 4 =
  33. 33.75 × 4 =
  34. 34.64 × 4 =
  35. 35.24 × 4 =
  36. 36.36 × 8 =
  37. 37.67 × 4 =
  38. 38.31 × 4 =
  39. 39.19 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 216
  2. 248
  3. 160
  4. 120
  5. 284
  6. 192
  7. 96
  8. 160
  9. 244
  10. 112
  11. 104
  12. 136
  13. 56
  14. 200
  15. 232
  16. 204
  17. 296
  18. 72
  19. 168
  20. 64
  21. 240
  22. 184
  23. 192
  24. 172
  25. 184
  26. 168
  27. 152
  28. 228
  29. 264
  30. 80
  31. 152
  32. 104
  33. 300
  34. 256
  35. 96
  36. 288
  37. 268
  38. 124
  39. 76
  40. 292

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