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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 569 · 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. 1.14 × 8 =
  2. 2.26 × 4 =
  3. 3.32 × 8 =
  4. 4.38 × 8 =
  5. 5.53 × 4 =
  6. 6.13 × 8 =
  7. 7.21 × 4 =
  8. 8.22 × 8 =
  9. 9.69 × 4 =
  10. 10.24 × 8 =
  11. 11.29 × 8 =
  12. 12.59 × 4 =
  13. 13.33 × 8 =
  14. 14.27 × 4 =
  15. 15.36 × 4 =
  16. 16.12 × 8 =
  17. 17.36 × 8 =
  18. 18.24 × 4 =
  19. 19.45 × 4 =
  20. 20.64 × 4 =
  21. 21.35 × 4 =
  22. 22.27 × 8 =
  23. 23.30 × 8 =
  24. 24.41 × 4 =
  25. 25.58 × 4 =
  26. 26.71 × 4 =
  27. 27.62 × 4 =
  28. 28.57 × 4 =
  29. 29.40 × 8 =
  30. 30.34 × 8 =
  31. 31.17 × 8 =
  32. 32.31 × 8 =
  33. 33.33 × 4 =
  34. 34.19 × 4 =
  35. 35.16 × 8 =
  36. 36.29 × 4 =
  37. 37.25 × 8 =
  38. 38.61 × 4 =
  39. 39.16 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 112
  2. 104
  3. 256
  4. 304
  5. 212
  6. 104
  7. 84
  8. 176
  9. 276
  10. 192
  11. 232
  12. 236
  13. 264
  14. 108
  15. 144
  16. 96
  17. 288
  18. 96
  19. 180
  20. 256
  21. 140
  22. 216
  23. 240
  24. 164
  25. 232
  26. 284
  27. 248
  28. 228
  29. 320
  30. 272
  31. 136
  32. 248
  33. 132
  34. 76
  35. 128
  36. 116
  37. 200
  38. 244
  39. 64
  40. 296

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