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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 270 · 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. 1.21 × 8 =
  2. 2.62 × 4 =
  3. 3.17 × 8 =
  4. 4.19 × 8 =
  5. 5.26 × 4 =
  6. 6.27 × 8 =
  7. 7.12 × 8 =
  8. 8.20 × 4 =
  9. 9.51 × 4 =
  10. 10.38 × 8 =
  11. 11.23 × 4 =
  12. 12.71 × 4 =
  13. 13.60 × 4 =
  14. 14.32 × 4 =
  15. 15.18 × 8 =
  16. 16.57 × 4 =
  17. 17.65 × 4 =
  18. 18.29 × 4 =
  19. 19.33 × 4 =
  20. 20.20 × 8 =
  21. 21.28 × 8 =
  22. 22.39 × 8 =
  23. 23.29 × 8 =
  24. 24.58 × 4 =
  25. 25.46 × 4 =
  26. 26.52 × 4 =
  27. 27.40 × 8 =
  28. 28.15 × 4 =
  29. 29.16 × 4 =
  30. 30.41 × 4 =
  31. 31.22 × 8 =
  32. 32.14 × 8 =
  33. 33.40 × 4 =
  34. 34.35 × 4 =
  35. 35.75 × 4 =
  36. 36.30 × 8 =
  37. 37.33 × 8 =
  38. 38.13 × 8 =
  39. 39.44 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 168
  2. 248
  3. 136
  4. 152
  5. 104
  6. 216
  7. 96
  8. 80
  9. 204
  10. 304
  11. 92
  12. 284
  13. 240
  14. 128
  15. 144
  16. 228
  17. 260
  18. 116
  19. 132
  20. 160
  21. 224
  22. 312
  23. 232
  24. 232
  25. 184
  26. 208
  27. 320
  28. 60
  29. 64
  30. 164
  31. 176
  32. 112
  33. 160
  34. 140
  35. 300
  36. 240
  37. 264
  38. 104
  39. 176
  40. 192

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