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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 8 · 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. 1.29 × 8 =
  2. 2.19 × 4 =
  3. 3.17 × 4 =
  4. 4.24 × 8 =
  5. 5.26 × 8 =
  6. 6.71 × 4 =
  7. 7.22 × 8 =
  8. 8.56 × 4 =
  9. 9.32 × 8 =
  10. 10.28 × 4 =
  11. 11.61 × 4 =
  12. 12.27 × 8 =
  13. 13.40 × 8 =
  14. 14.17 × 8 =
  15. 15.41 × 4 =
  16. 16.15 × 4 =
  17. 17.72 × 4 =
  18. 18.70 × 4 =
  19. 19.20 × 8 =
  20. 20.55 × 4 =
  21. 21.43 × 4 =
  22. 22.19 × 8 =
  23. 23.46 × 4 =
  24. 24.27 × 4 =
  25. 25.28 × 8 =
  26. 26.45 × 4 =
  27. 27.37 × 4 =
  28. 28.34 × 8 =
  29. 29.51 × 4 =
  30. 30.14 × 8 =
  31. 31.23 × 8 =
  32. 32.16 × 8 =
  33. 33.21 × 4 =
  34. 34.62 × 4 =
  35. 35.60 × 4 =
  36. 36.57 × 4 =
  37. 37.39 × 8 =
  38. 38.20 × 4 =
  39. 39.18 × 8 =
  40. 40.67 × 4 =

Answer key

  1. 232
  2. 76
  3. 68
  4. 192
  5. 208
  6. 284
  7. 176
  8. 224
  9. 256
  10. 112
  11. 244
  12. 216
  13. 320
  14. 136
  15. 164
  16. 60
  17. 288
  18. 280
  19. 160
  20. 220
  21. 172
  22. 152
  23. 184
  24. 108
  25. 224
  26. 180
  27. 148
  28. 272
  29. 204
  30. 112
  31. 184
  32. 128
  33. 84
  34. 248
  35. 240
  36. 228
  37. 312
  38. 80
  39. 144
  40. 268

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