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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 548 · 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. 1.69 × 4 =
  2. 2.62 × 4 =
  3. 3.60 × 4 =
  4. 4.61 × 4 =
  5. 5.73 × 4 =
  6. 6.27 × 4 =
  7. 7.23 × 4 =
  8. 8.58 × 4 =
  9. 9.67 × 4 =
  10. 10.74 × 4 =
  11. 11.12 × 4 =
  12. 12.30 × 8 =
  13. 13.19 × 8 =
  14. 14.30 × 4 =
  15. 15.37 × 8 =
  16. 16.41 × 4 =
  17. 17.38 × 8 =
  18. 18.39 × 8 =
  19. 19.65 × 4 =
  20. 20.47 × 4 =
  21. 21.35 × 8 =
  22. 22.45 × 4 =
  23. 23.28 × 4 =
  24. 24.24 × 4 =
  25. 25.15 × 4 =
  26. 26.70 × 4 =
  27. 27.49 × 4 =
  28. 28.68 × 4 =
  29. 29.33 × 4 =
  30. 30.32 × 8 =
  31. 31.36 × 8 =
  32. 32.36 × 4 =
  33. 33.25 × 4 =
  34. 34.18 × 8 =
  35. 35.63 × 4 =
  36. 36.13 × 4 =
  37. 37.29 × 8 =
  38. 38.66 × 4 =
  39. 39.28 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 276
  2. 248
  3. 240
  4. 244
  5. 292
  6. 108
  7. 92
  8. 232
  9. 268
  10. 296
  11. 48
  12. 240
  13. 152
  14. 120
  15. 296
  16. 164
  17. 304
  18. 312
  19. 260
  20. 188
  21. 280
  22. 180
  23. 112
  24. 96
  25. 60
  26. 280
  27. 196
  28. 272
  29. 132
  30. 256
  31. 288
  32. 144
  33. 100
  34. 144
  35. 252
  36. 52
  37. 232
  38. 264
  39. 224
  40. 112

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