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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 373 · 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. 1.38 × 8 =
  2. 2.69 × 4 =
  3. 3.24 × 8 =
  4. 4.26 × 4 =
  5. 5.49 × 4 =
  6. 6.12 × 4 =
  7. 7.15 × 8 =
  8. 8.75 × 4 =
  9. 9.30 × 8 =
  10. 10.19 × 8 =
  11. 11.68 × 4 =
  12. 12.25 × 8 =
  13. 13.18 × 8 =
  14. 14.32 × 4 =
  15. 15.22 × 8 =
  16. 16.31 × 4 =
  17. 17.35 × 8 =
  18. 18.13 × 4 =
  19. 19.34 × 8 =
  20. 20.57 × 4 =
  21. 21.33 × 8 =
  22. 22.23 × 4 =
  23. 23.14 × 8 =
  24. 24.59 × 4 =
  25. 25.25 × 4 =
  26. 26.21 × 8 =
  27. 27.13 × 8 =
  28. 28.17 × 8 =
  29. 29.31 × 8 =
  30. 30.37 × 8 =
  31. 31.37 × 4 =
  32. 32.41 × 4 =
  33. 33.40 × 4 =
  34. 34.71 × 4 =
  35. 35.40 × 8 =
  36. 36.62 × 4 =
  37. 37.34 × 4 =
  38. 38.36 × 4 =
  39. 39.39 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 304
  2. 276
  3. 192
  4. 104
  5. 196
  6. 48
  7. 120
  8. 300
  9. 240
  10. 152
  11. 272
  12. 200
  13. 144
  14. 128
  15. 176
  16. 124
  17. 280
  18. 52
  19. 272
  20. 228
  21. 264
  22. 92
  23. 112
  24. 236
  25. 100
  26. 168
  27. 104
  28. 136
  29. 248
  30. 296
  31. 148
  32. 164
  33. 160
  34. 284
  35. 320
  36. 248
  37. 136
  38. 144
  39. 156
  40. 176

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