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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 250 · 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. 1.35 × 8 =
  2. 2.34 × 8 =
  3. 3.59 × 4 =
  4. 4.18 × 4 =
  5. 5.37 × 8 =
  6. 6.29 × 8 =
  7. 7.14 × 4 =
  8. 8.33 × 4 =
  9. 9.21 × 8 =
  10. 10.20 × 8 =
  11. 11.45 × 4 =
  12. 12.32 × 4 =
  13. 13.31 × 8 =
  14. 14.73 × 4 =
  15. 15.16 × 8 =
  16. 16.44 × 4 =
  17. 17.26 × 8 =
  18. 18.49 × 4 =
  19. 19.23 × 8 =
  20. 20.52 × 4 =
  21. 21.20 × 4 =
  22. 22.46 × 4 =
  23. 23.70 × 4 =
  24. 24.48 × 4 =
  25. 25.64 × 4 =
  26. 26.24 × 8 =
  27. 27.33 × 8 =
  28. 28.39 × 8 =
  29. 29.22 × 8 =
  30. 30.22 × 4 =
  31. 31.13 × 4 =
  32. 32.67 × 4 =
  33. 33.25 × 8 =
  34. 34.28 × 4 =
  35. 35.43 × 4 =
  36. 36.14 × 8 =
  37. 37.61 × 4 =
  38. 38.37 × 4 =
  39. 39.32 × 8 =
  40. 40.58 × 4 =

Answer key

  1. 280
  2. 272
  3. 236
  4. 72
  5. 296
  6. 232
  7. 56
  8. 132
  9. 168
  10. 160
  11. 180
  12. 128
  13. 248
  14. 292
  15. 128
  16. 176
  17. 208
  18. 196
  19. 184
  20. 208
  21. 80
  22. 184
  23. 280
  24. 192
  25. 256
  26. 192
  27. 264
  28. 312
  29. 176
  30. 88
  31. 52
  32. 268
  33. 200
  34. 112
  35. 172
  36. 112
  37. 244
  38. 148
  39. 256
  40. 232

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