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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 454 · 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. 1.41 × 4 =
  2. 2.65 × 4 =
  3. 3.45 × 4 =
  4. 4.32 × 4 =
  5. 5.49 × 4 =
  6. 6.62 × 4 =
  7. 7.59 × 4 =
  8. 8.32 × 8 =
  9. 9.23 × 4 =
  10. 10.74 × 4 =
  11. 11.22 × 4 =
  12. 12.40 × 4 =
  13. 13.36 × 8 =
  14. 14.20 × 8 =
  15. 15.35 × 8 =
  16. 16.16 × 8 =
  17. 17.15 × 8 =
  18. 18.30 × 8 =
  19. 19.26 × 8 =
  20. 20.39 × 4 =
  21. 21.26 × 4 =
  22. 22.42 × 4 =
  23. 23.17 × 8 =
  24. 24.40 × 8 =
  25. 25.68 × 4 =
  26. 26.38 × 8 =
  27. 27.25 × 8 =
  28. 28.37 × 4 =
  29. 29.37 × 8 =
  30. 30.18 × 4 =
  31. 31.33 × 8 =
  32. 32.23 × 8 =
  33. 33.14 × 8 =
  34. 34.19 × 8 =
  35. 35.24 × 8 =
  36. 36.33 × 4 =
  37. 37.48 × 4 =
  38. 38.12 × 8 =
  39. 39.46 × 4 =
  40. 40.34 × 4 =

Answer key

  1. 164
  2. 260
  3. 180
  4. 128
  5. 196
  6. 248
  7. 236
  8. 256
  9. 92
  10. 296
  11. 88
  12. 160
  13. 288
  14. 160
  15. 280
  16. 128
  17. 120
  18. 240
  19. 208
  20. 156
  21. 104
  22. 168
  23. 136
  24. 320
  25. 272
  26. 304
  27. 200
  28. 148
  29. 296
  30. 72
  31. 264
  32. 184
  33. 112
  34. 152
  35. 192
  36. 132
  37. 192
  38. 96
  39. 184
  40. 136

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