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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 779 · 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. 1.27 × 8 =
  2. 2.51 × 4 =
  3. 3.39 × 8 =
  4. 4.24 × 8 =
  5. 5.26 × 4 =
  6. 6.13 × 8 =
  7. 7.23 × 8 =
  8. 8.17 × 4 =
  9. 9.33 × 8 =
  10. 10.72 × 4 =
  11. 11.36 × 8 =
  12. 12.44 × 4 =
  13. 13.14 × 8 =
  14. 14.18 × 8 =
  15. 15.26 × 8 =
  16. 16.29 × 8 =
  17. 17.30 × 4 =
  18. 18.31 × 8 =
  19. 19.38 × 4 =
  20. 20.35 × 8 =
  21. 21.40 × 8 =
  22. 22.16 × 8 =
  23. 23.37 × 8 =
  24. 24.41 × 4 =
  25. 25.57 × 4 =
  26. 26.30 × 8 =
  27. 27.40 × 4 =
  28. 28.23 × 4 =
  29. 29.20 × 8 =
  30. 30.75 × 4 =
  31. 31.53 × 4 =
  32. 32.21 × 4 =
  33. 33.43 × 4 =
  34. 34.12 × 4 =
  35. 35.19 × 4 =
  36. 36.12 × 8 =
  37. 37.55 × 4 =
  38. 38.34 × 4 =
  39. 39.52 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 216
  2. 204
  3. 312
  4. 192
  5. 104
  6. 104
  7. 184
  8. 68
  9. 264
  10. 288
  11. 288
  12. 176
  13. 112
  14. 144
  15. 208
  16. 232
  17. 120
  18. 248
  19. 152
  20. 280
  21. 320
  22. 128
  23. 296
  24. 164
  25. 228
  26. 240
  27. 160
  28. 92
  29. 160
  30. 300
  31. 212
  32. 84
  33. 172
  34. 48
  35. 76
  36. 96
  37. 220
  38. 136
  39. 208
  40. 112

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