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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 851 · 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. 1.17 × 8 =
  2. 2.29 × 8 =
  3. 3.45 × 4 =
  4. 4.46 × 4 =
  5. 5.19 × 8 =
  6. 6.39 × 8 =
  7. 7.28 × 4 =
  8. 8.41 × 4 =
  9. 9.13 × 8 =
  10. 10.63 × 4 =
  11. 11.20 × 8 =
  12. 12.23 × 4 =
  13. 13.30 × 8 =
  14. 14.27 × 8 =
  15. 15.40 × 4 =
  16. 16.54 × 4 =
  17. 17.38 × 8 =
  18. 18.16 × 8 =
  19. 19.71 × 4 =
  20. 20.18 × 8 =
  21. 21.35 × 4 =
  22. 22.27 × 4 =
  23. 23.33 × 8 =
  24. 24.25 × 8 =
  25. 25.34 × 8 =
  26. 26.31 × 4 =
  27. 27.62 × 4 =
  28. 28.48 × 4 =
  29. 29.35 × 8 =
  30. 30.74 × 4 =
  31. 31.36 × 8 =
  32. 32.53 × 4 =
  33. 33.24 × 4 =
  34. 34.21 × 8 =
  35. 35.25 × 4 =
  36. 36.15 × 4 =
  37. 37.20 × 4 =
  38. 38.56 × 4 =
  39. 39.47 × 4 =
  40. 40.75 × 4 =

Answer key

  1. 136
  2. 232
  3. 180
  4. 184
  5. 152
  6. 312
  7. 112
  8. 164
  9. 104
  10. 252
  11. 160
  12. 92
  13. 240
  14. 216
  15. 160
  16. 216
  17. 304
  18. 128
  19. 284
  20. 144
  21. 140
  22. 108
  23. 264
  24. 200
  25. 272
  26. 124
  27. 248
  28. 192
  29. 280
  30. 296
  31. 288
  32. 212
  33. 96
  34. 168
  35. 100
  36. 60
  37. 80
  38. 224
  39. 188
  40. 300

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