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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 694 · 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. 1.23 × 8 =
  2. 2.61 × 4 =
  3. 3.34 × 4 =
  4. 4.69 × 4 =
  5. 5.20 × 4 =
  6. 6.26 × 8 =
  7. 7.30 × 8 =
  8. 8.12 × 8 =
  9. 9.39 × 4 =
  10. 10.22 × 8 =
  11. 11.37 × 8 =
  12. 12.29 × 4 =
  13. 13.15 × 4 =
  14. 14.35 × 8 =
  15. 15.33 × 4 =
  16. 16.28 × 8 =
  17. 17.46 × 4 =
  18. 18.33 × 8 =
  19. 19.27 × 8 =
  20. 20.32 × 8 =
  21. 21.37 × 4 =
  22. 22.49 × 4 =
  23. 23.17 × 8 =
  24. 24.34 × 8 =
  25. 25.57 × 4 =
  26. 26.13 × 8 =
  27. 27.17 × 4 =
  28. 28.13 × 4 =
  29. 29.44 × 4 =
  30. 30.25 × 4 =
  31. 31.43 × 4 =
  32. 32.31 × 8 =
  33. 33.36 × 4 =
  34. 34.39 × 8 =
  35. 35.26 × 4 =
  36. 36.70 × 4 =
  37. 37.38 × 8 =
  38. 38.40 × 4 =
  39. 39.50 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 184
  2. 244
  3. 136
  4. 276
  5. 80
  6. 208
  7. 240
  8. 96
  9. 156
  10. 176
  11. 296
  12. 116
  13. 60
  14. 280
  15. 132
  16. 224
  17. 184
  18. 264
  19. 216
  20. 256
  21. 148
  22. 196
  23. 136
  24. 272
  25. 228
  26. 104
  27. 68
  28. 52
  29. 176
  30. 100
  31. 172
  32. 248
  33. 144
  34. 312
  35. 104
  36. 280
  37. 304
  38. 160
  39. 200
  40. 192

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