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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 353 · 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. 1.55 × 4 =
  2. 2.27 × 4 =
  3. 3.24 × 4 =
  4. 4.31 × 4 =
  5. 5.32 × 4 =
  6. 6.12 × 8 =
  7. 7.43 × 4 =
  8. 8.61 × 4 =
  9. 9.73 × 4 =
  10. 10.34 × 8 =
  11. 11.28 × 8 =
  12. 12.19 × 4 =
  13. 13.14 × 4 =
  14. 14.12 × 4 =
  15. 15.38 × 4 =
  16. 16.28 × 4 =
  17. 17.62 × 4 =
  18. 18.32 × 8 =
  19. 19.39 × 8 =
  20. 20.17 × 4 =
  21. 21.50 × 4 =
  22. 22.67 × 4 =
  23. 23.40 × 8 =
  24. 24.15 × 8 =
  25. 25.53 × 4 =
  26. 26.17 × 8 =
  27. 27.39 × 4 =
  28. 28.19 × 8 =
  29. 29.38 × 8 =
  30. 30.18 × 4 =
  31. 31.49 × 4 =
  32. 32.35 × 4 =
  33. 33.22 × 4 =
  34. 34.70 × 4 =
  35. 35.22 × 8 =
  36. 36.36 × 8 =
  37. 37.29 × 8 =
  38. 38.37 × 8 =
  39. 39.74 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 220
  2. 108
  3. 96
  4. 124
  5. 128
  6. 96
  7. 172
  8. 244
  9. 292
  10. 272
  11. 224
  12. 76
  13. 56
  14. 48
  15. 152
  16. 112
  17. 248
  18. 256
  19. 312
  20. 68
  21. 200
  22. 268
  23. 320
  24. 120
  25. 212
  26. 136
  27. 156
  28. 152
  29. 304
  30. 72
  31. 196
  32. 140
  33. 88
  34. 280
  35. 176
  36. 288
  37. 232
  38. 296
  39. 296
  40. 104

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