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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 589 · 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. 1.33 × 8 =
  2. 2.42 × 4 =
  3. 3.51 × 4 =
  4. 4.47 × 4 =
  5. 5.17 × 8 =
  6. 6.70 × 4 =
  7. 7.37 × 8 =
  8. 8.28 × 4 =
  9. 9.26 × 8 =
  10. 10.62 × 4 =
  11. 11.26 × 4 =
  12. 12.40 × 8 =
  13. 13.37 × 4 =
  14. 14.73 × 4 =
  15. 15.36 × 8 =
  16. 16.22 × 4 =
  17. 17.34 × 8 =
  18. 18.41 × 4 =
  19. 19.20 × 4 =
  20. 20.39 × 8 =
  21. 21.58 × 4 =
  22. 22.67 × 4 =
  23. 23.19 × 8 =
  24. 24.63 × 4 =
  25. 25.14 × 8 =
  26. 26.28 × 8 =
  27. 27.66 × 4 =
  28. 28.50 × 4 =
  29. 29.46 × 4 =
  30. 30.21 × 8 =
  31. 31.48 × 4 =
  32. 32.53 × 4 =
  33. 33.21 × 4 =
  34. 34.52 × 4 =
  35. 35.18 × 4 =
  36. 36.16 × 4 =
  37. 37.15 × 8 =
  38. 38.17 × 4 =
  39. 39.19 × 4 =
  40. 40.49 × 4 =

Answer key

  1. 264
  2. 168
  3. 204
  4. 188
  5. 136
  6. 280
  7. 296
  8. 112
  9. 208
  10. 248
  11. 104
  12. 320
  13. 148
  14. 292
  15. 288
  16. 88
  17. 272
  18. 164
  19. 80
  20. 312
  21. 232
  22. 268
  23. 152
  24. 252
  25. 112
  26. 224
  27. 264
  28. 200
  29. 184
  30. 168
  31. 192
  32. 212
  33. 84
  34. 208
  35. 72
  36. 64
  37. 120
  38. 68
  39. 76
  40. 196

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