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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 119 · 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. 1.33 × 8 =
  2. 2.28 × 8 =
  3. 3.17 × 4 =
  4. 4.37 × 8 =
  5. 5.24 × 4 =
  6. 6.40 × 4 =
  7. 7.50 × 4 =
  8. 8.17 × 8 =
  9. 9.16 × 8 =
  10. 10.28 × 4 =
  11. 11.31 × 8 =
  12. 12.46 × 4 =
  13. 13.29 × 4 =
  14. 14.27 × 4 =
  15. 15.73 × 4 =
  16. 16.18 × 4 =
  17. 17.36 × 8 =
  18. 18.38 × 8 =
  19. 19.29 × 8 =
  20. 20.12 × 4 =
  21. 21.69 × 4 =
  22. 22.16 × 4 =
  23. 23.54 × 4 =
  24. 24.23 × 8 =
  25. 25.58 × 4 =
  26. 26.57 × 4 =
  27. 27.18 × 8 =
  28. 28.15 × 4 =
  29. 29.43 × 4 =
  30. 30.32 × 8 =
  31. 31.19 × 8 =
  32. 32.34 × 8 =
  33. 33.26 × 4 =
  34. 34.26 × 8 =
  35. 35.45 × 4 =
  36. 36.31 × 4 =
  37. 37.39 × 8 =
  38. 38.34 × 4 =
  39. 39.75 × 4 =
  40. 40.53 × 4 =

Answer key

  1. 264
  2. 224
  3. 68
  4. 296
  5. 96
  6. 160
  7. 200
  8. 136
  9. 128
  10. 112
  11. 248
  12. 184
  13. 116
  14. 108
  15. 292
  16. 72
  17. 288
  18. 304
  19. 232
  20. 48
  21. 276
  22. 64
  23. 216
  24. 184
  25. 232
  26. 228
  27. 144
  28. 60
  29. 172
  30. 256
  31. 152
  32. 272
  33. 104
  34. 208
  35. 180
  36. 124
  37. 312
  38. 136
  39. 300
  40. 212

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