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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 662 · 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. 1.31 × 8 =
  2. 2.22 × 8 =
  3. 3.70 × 4 =
  4. 4.57 × 4 =
  5. 5.16 × 8 =
  6. 6.21 × 4 =
  7. 7.36 × 4 =
  8. 8.69 × 4 =
  9. 9.24 × 4 =
  10. 10.30 × 8 =
  11. 11.28 × 4 =
  12. 12.44 × 4 =
  13. 13.27 × 4 =
  14. 14.20 × 8 =
  15. 15.73 × 4 =
  16. 16.34 × 8 =
  17. 17.12 × 8 =
  18. 18.40 × 8 =
  19. 19.24 × 8 =
  20. 20.19 × 8 =
  21. 21.26 × 4 =
  22. 22.62 × 4 =
  23. 23.47 × 4 =
  24. 24.32 × 8 =
  25. 25.64 × 4 =
  26. 26.46 × 4 =
  27. 27.12 × 4 =
  28. 28.58 × 4 =
  29. 29.42 × 4 =
  30. 30.27 × 8 =
  31. 31.72 × 4 =
  32. 32.33 × 8 =
  33. 33.25 × 8 =
  34. 34.14 × 8 =
  35. 35.67 × 4 =
  36. 36.37 × 8 =
  37. 37.59 × 4 =
  38. 38.13 × 8 =
  39. 39.14 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 248
  2. 176
  3. 280
  4. 228
  5. 128
  6. 84
  7. 144
  8. 276
  9. 96
  10. 240
  11. 112
  12. 176
  13. 108
  14. 160
  15. 292
  16. 272
  17. 96
  18. 320
  19. 192
  20. 152
  21. 104
  22. 248
  23. 188
  24. 256
  25. 256
  26. 184
  27. 48
  28. 232
  29. 168
  30. 216
  31. 288
  32. 264
  33. 200
  34. 112
  35. 268
  36. 296
  37. 236
  38. 104
  39. 56
  40. 168

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