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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 740 · 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. 2.26 × 4 =
  3. 3.49 × 4 =
  4. 4.21 × 8 =
  5. 5.21 × 4 =
  6. 6.73 × 4 =
  7. 7.42 × 4 =
  8. 8.74 × 4 =
  9. 9.45 × 4 =
  10. 10.16 × 8 =
  11. 11.57 × 4 =
  12. 12.26 × 8 =
  13. 13.36 × 4 =
  14. 14.20 × 8 =
  15. 15.22 × 8 =
  16. 16.67 × 4 =
  17. 17.20 × 4 =
  18. 18.14 × 8 =
  19. 19.54 × 4 =
  20. 20.59 × 4 =
  21. 21.25 × 8 =
  22. 22.70 × 4 =
  23. 23.46 × 4 =
  24. 24.28 × 4 =
  25. 25.17 × 8 =
  26. 26.13 × 8 =
  27. 27.15 × 8 =
  28. 28.23 × 8 =
  29. 29.36 × 8 =
  30. 30.52 × 4 =
  31. 31.68 × 4 =
  32. 32.41 × 4 =
  33. 33.38 × 8 =
  34. 34.37 × 8 =
  35. 35.31 × 8 =
  36. 36.24 × 8 =
  37. 37.30 × 4 =
  38. 38.40 × 4 =
  39. 39.48 × 4 =
  40. 40.61 × 4 =

Answer key

  1. 272
  2. 104
  3. 196
  4. 168
  5. 84
  6. 292
  7. 168
  8. 296
  9. 180
  10. 128
  11. 228
  12. 208
  13. 144
  14. 160
  15. 176
  16. 268
  17. 80
  18. 112
  19. 216
  20. 236
  21. 200
  22. 280
  23. 184
  24. 112
  25. 136
  26. 104
  27. 120
  28. 184
  29. 288
  30. 208
  31. 272
  32. 164
  33. 304
  34. 296
  35. 248
  36. 192
  37. 120
  38. 160
  39. 192
  40. 244

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