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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 597 · 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. 1.51 × 4 =
  2. 2.63 × 4 =
  3. 3.62 × 4 =
  4. 4.46 × 4 =
  5. 5.43 × 4 =
  6. 6.27 × 8 =
  7. 7.57 × 4 =
  8. 8.38 × 8 =
  9. 9.53 × 4 =
  10. 10.19 × 8 =
  11. 11.12 × 8 =
  12. 12.61 × 4 =
  13. 13.70 × 4 =
  14. 14.18 × 8 =
  15. 15.30 × 8 =
  16. 16.45 × 4 =
  17. 17.15 × 8 =
  18. 18.36 × 8 =
  19. 19.17 × 8 =
  20. 20.21 × 8 =
  21. 21.26 × 4 =
  22. 22.66 × 4 =
  23. 23.31 × 8 =
  24. 24.31 × 4 =
  25. 25.35 × 8 =
  26. 26.14 × 8 =
  27. 27.33 × 8 =
  28. 28.42 × 4 =
  29. 29.34 × 8 =
  30. 30.13 × 8 =
  31. 31.37 × 8 =
  32. 32.17 × 4 =
  33. 33.49 × 4 =
  34. 34.72 × 4 =
  35. 35.30 × 4 =
  36. 36.27 × 4 =
  37. 37.18 × 4 =
  38. 38.38 × 4 =
  39. 39.67 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 204
  2. 252
  3. 248
  4. 184
  5. 172
  6. 216
  7. 228
  8. 304
  9. 212
  10. 152
  11. 96
  12. 244
  13. 280
  14. 144
  15. 240
  16. 180
  17. 120
  18. 288
  19. 136
  20. 168
  21. 104
  22. 264
  23. 248
  24. 124
  25. 280
  26. 112
  27. 264
  28. 168
  29. 272
  30. 104
  31. 296
  32. 68
  33. 196
  34. 288
  35. 120
  36. 108
  37. 72
  38. 152
  39. 268
  40. 128

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