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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 482 · 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. 1.34 × 8 =
  2. 2.56 × 4 =
  3. 3.12 × 8 =
  4. 4.27 × 4 =
  5. 5.16 × 8 =
  6. 6.32 × 8 =
  7. 7.36 × 8 =
  8. 8.66 × 4 =
  9. 9.70 × 4 =
  10. 10.35 × 8 =
  11. 11.14 × 8 =
  12. 12.28 × 8 =
  13. 13.53 × 4 =
  14. 14.30 × 4 =
  15. 15.17 × 8 =
  16. 16.63 × 4 =
  17. 17.23 × 8 =
  18. 18.15 × 8 =
  19. 19.20 × 8 =
  20. 20.69 × 4 =
  21. 21.37 × 8 =
  22. 22.58 × 4 =
  23. 23.40 × 4 =
  24. 24.22 × 8 =
  25. 25.75 × 4 =
  26. 26.29 × 8 =
  27. 27.55 × 4 =
  28. 28.13 × 8 =
  29. 29.31 × 8 =
  30. 30.29 × 4 =
  31. 31.18 × 8 =
  32. 32.12 × 4 =
  33. 33.38 × 8 =
  34. 34.44 × 4 =
  35. 35.21 × 4 =
  36. 36.37 × 4 =
  37. 37.59 × 4 =
  38. 38.17 × 4 =
  39. 39.36 × 4 =
  40. 40.61 × 4 =

Answer key

  1. 272
  2. 224
  3. 96
  4. 108
  5. 128
  6. 256
  7. 288
  8. 264
  9. 280
  10. 280
  11. 112
  12. 224
  13. 212
  14. 120
  15. 136
  16. 252
  17. 184
  18. 120
  19. 160
  20. 276
  21. 296
  22. 232
  23. 160
  24. 176
  25. 300
  26. 232
  27. 220
  28. 104
  29. 248
  30. 116
  31. 144
  32. 48
  33. 304
  34. 176
  35. 84
  36. 148
  37. 236
  38. 68
  39. 144
  40. 244

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