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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 549 · 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. 1.55 × 4 =
  2. 2.48 × 4 =
  3. 3.15 × 4 =
  4. 4.29 × 8 =
  5. 5.57 × 4 =
  6. 6.31 × 8 =
  7. 7.20 × 8 =
  8. 8.24 × 8 =
  9. 9.23 × 4 =
  10. 10.15 × 8 =
  11. 11.36 × 8 =
  12. 12.75 × 4 =
  13. 13.20 × 4 =
  14. 14.37 × 8 =
  15. 15.25 × 4 =
  16. 16.19 × 8 =
  17. 17.44 × 4 =
  18. 18.12 × 4 =
  19. 19.35 × 8 =
  20. 20.34 × 8 =
  21. 21.14 × 8 =
  22. 22.25 × 8 =
  23. 23.35 × 4 =
  24. 24.12 × 8 =
  25. 25.30 × 8 =
  26. 26.43 × 4 =
  27. 27.37 × 4 =
  28. 28.22 × 4 =
  29. 29.54 × 4 =
  30. 30.17 × 4 =
  31. 31.19 × 4 =
  32. 32.32 × 8 =
  33. 33.39 × 8 =
  34. 34.53 × 4 =
  35. 35.46 × 4 =
  36. 36.33 × 4 =
  37. 37.27 × 8 =
  38. 38.68 × 4 =
  39. 39.52 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 220
  2. 192
  3. 60
  4. 232
  5. 228
  6. 248
  7. 160
  8. 192
  9. 92
  10. 120
  11. 288
  12. 300
  13. 80
  14. 296
  15. 100
  16. 152
  17. 176
  18. 48
  19. 280
  20. 272
  21. 112
  22. 200
  23. 140
  24. 96
  25. 240
  26. 172
  27. 148
  28. 88
  29. 216
  30. 68
  31. 76
  32. 256
  33. 312
  34. 212
  35. 184
  36. 132
  37. 216
  38. 272
  39. 208
  40. 208

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