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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 652 · 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. 1.63 × 4 =
  2. 2.41 × 4 =
  3. 3.19 × 8 =
  4. 4.40 × 4 =
  5. 5.22 × 4 =
  6. 6.20 × 8 =
  7. 7.46 × 4 =
  8. 8.44 × 4 =
  9. 9.33 × 8 =
  10. 10.18 × 8 =
  11. 11.72 × 4 =
  12. 12.45 × 4 =
  13. 13.15 × 4 =
  14. 14.26 × 8 =
  15. 15.27 × 8 =
  16. 16.53 × 4 =
  17. 17.23 × 4 =
  18. 18.35 × 8 =
  19. 19.30 × 8 =
  20. 20.38 × 8 =
  21. 21.75 × 4 =
  22. 22.13 × 8 =
  23. 23.29 × 8 =
  24. 24.33 × 4 =
  25. 25.40 × 8 =
  26. 26.16 × 8 =
  27. 27.24 × 8 =
  28. 28.27 × 4 =
  29. 29.69 × 4 =
  30. 30.71 × 4 =
  31. 31.21 × 8 =
  32. 32.28 × 8 =
  33. 33.68 × 4 =
  34. 34.39 × 4 =
  35. 35.14 × 4 =
  36. 36.35 × 4 =
  37. 37.28 × 4 =
  38. 38.31 × 8 =
  39. 39.23 × 8 =
  40. 40.24 × 4 =

Answer key

  1. 252
  2. 164
  3. 152
  4. 160
  5. 88
  6. 160
  7. 184
  8. 176
  9. 264
  10. 144
  11. 288
  12. 180
  13. 60
  14. 208
  15. 216
  16. 212
  17. 92
  18. 280
  19. 240
  20. 304
  21. 300
  22. 104
  23. 232
  24. 132
  25. 320
  26. 128
  27. 192
  28. 108
  29. 276
  30. 284
  31. 168
  32. 224
  33. 272
  34. 156
  35. 56
  36. 140
  37. 112
  38. 248
  39. 184
  40. 96

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