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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 767 · 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. 1.22 × 4 =
  2. 2.71 × 4 =
  3. 3.25 × 8 =
  4. 4.26 × 8 =
  5. 5.24 × 8 =
  6. 6.16 × 8 =
  7. 7.39 × 8 =
  8. 8.31 × 8 =
  9. 9.51 × 4 =
  10. 10.45 × 4 =
  11. 11.41 × 4 =
  12. 12.49 × 4 =
  13. 13.48 × 4 =
  14. 14.22 × 8 =
  15. 15.27 × 4 =
  16. 16.40 × 4 =
  17. 17.13 × 8 =
  18. 18.38 × 8 =
  19. 19.72 × 4 =
  20. 20.15 × 4 =
  21. 21.57 × 4 =
  22. 22.30 × 4 =
  23. 23.14 × 8 =
  24. 24.21 × 8 =
  25. 25.32 × 8 =
  26. 26.29 × 4 =
  27. 27.50 × 4 =
  28. 28.58 × 4 =
  29. 29.18 × 8 =
  30. 30.39 × 4 =
  31. 31.20 × 8 =
  32. 32.34 × 8 =
  33. 33.46 × 4 =
  34. 34.29 × 8 =
  35. 35.19 × 8 =
  36. 36.69 × 4 =
  37. 37.33 × 4 =
  38. 38.40 × 8 =
  39. 39.12 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 88
  2. 284
  3. 200
  4. 208
  5. 192
  6. 128
  7. 312
  8. 248
  9. 204
  10. 180
  11. 164
  12. 196
  13. 192
  14. 176
  15. 108
  16. 160
  17. 104
  18. 304
  19. 288
  20. 60
  21. 228
  22. 120
  23. 112
  24. 168
  25. 256
  26. 116
  27. 200
  28. 232
  29. 144
  30. 156
  31. 160
  32. 272
  33. 184
  34. 232
  35. 152
  36. 276
  37. 132
  38. 320
  39. 96
  40. 220

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