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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 166 · 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. 2.23 × 8 =
  3. 3.65 × 4 =
  4. 4.34 × 8 =
  5. 5.12 × 4 =
  6. 6.21 × 8 =
  7. 7.12 × 8 =
  8. 8.41 × 4 =
  9. 9.66 × 4 =
  10. 10.16 × 8 =
  11. 11.62 × 4 =
  12. 12.74 × 4 =
  13. 13.49 × 4 =
  14. 14.35 × 4 =
  15. 15.71 × 4 =
  16. 16.15 × 8 =
  17. 17.21 × 4 =
  18. 18.13 × 8 =
  19. 19.20 × 4 =
  20. 20.29 × 8 =
  21. 21.73 × 4 =
  22. 22.26 × 4 =
  23. 23.42 × 4 =
  24. 24.24 × 4 =
  25. 25.50 × 4 =
  26. 26.29 × 4 =
  27. 27.19 × 8 =
  28. 28.39 × 8 =
  29. 29.68 × 4 =
  30. 30.36 × 8 =
  31. 31.27 × 8 =
  32. 32.67 × 4 =
  33. 33.19 × 4 =
  34. 34.30 × 8 =
  35. 35.22 × 8 =
  36. 36.48 × 4 =
  37. 37.18 × 4 =
  38. 38.24 × 8 =
  39. 39.54 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 264
  2. 184
  3. 260
  4. 272
  5. 48
  6. 168
  7. 96
  8. 164
  9. 264
  10. 128
  11. 248
  12. 296
  13. 196
  14. 140
  15. 284
  16. 120
  17. 84
  18. 104
  19. 80
  20. 232
  21. 292
  22. 104
  23. 168
  24. 96
  25. 200
  26. 116
  27. 152
  28. 312
  29. 272
  30. 288
  31. 216
  32. 268
  33. 76
  34. 240
  35. 176
  36. 192
  37. 72
  38. 192
  39. 216
  40. 184

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