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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 571 · 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. 1.68 × 4 =
  2. 2.47 × 4 =
  3. 3.28 × 4 =
  4. 4.17 × 4 =
  5. 5.65 × 4 =
  6. 6.23 × 8 =
  7. 7.31 × 4 =
  8. 8.32 × 8 =
  9. 9.16 × 8 =
  10. 10.19 × 4 =
  11. 11.72 × 4 =
  12. 12.64 × 4 =
  13. 13.18 × 8 =
  14. 14.34 × 8 =
  15. 15.57 × 4 =
  16. 16.14 × 8 =
  17. 17.58 × 4 =
  18. 18.61 × 4 =
  19. 19.37 × 8 =
  20. 20.21 × 4 =
  21. 21.73 × 4 =
  22. 22.42 × 4 =
  23. 23.49 × 4 =
  24. 24.13 × 4 =
  25. 25.38 × 8 =
  26. 26.19 × 8 =
  27. 27.12 × 8 =
  28. 28.60 × 4 =
  29. 29.29 × 8 =
  30. 30.43 × 4 =
  31. 31.22 × 8 =
  32. 32.56 × 4 =
  33. 33.33 × 8 =
  34. 34.26 × 4 =
  35. 35.13 × 8 =
  36. 36.26 × 8 =
  37. 37.36 × 4 =
  38. 38.17 × 8 =
  39. 39.39 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 272
  2. 188
  3. 112
  4. 68
  5. 260
  6. 184
  7. 124
  8. 256
  9. 128
  10. 76
  11. 288
  12. 256
  13. 144
  14. 272
  15. 228
  16. 112
  17. 232
  18. 244
  19. 296
  20. 84
  21. 292
  22. 168
  23. 196
  24. 52
  25. 304
  26. 152
  27. 96
  28. 240
  29. 232
  30. 172
  31. 176
  32. 224
  33. 264
  34. 104
  35. 104
  36. 208
  37. 144
  38. 136
  39. 312
  40. 56

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