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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 404 · 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. 1.40 × 8 =
  2. 2.63 × 4 =
  3. 3.32 × 8 =
  4. 4.35 × 8 =
  5. 5.28 × 4 =
  6. 6.22 × 8 =
  7. 7.59 × 4 =
  8. 8.12 × 8 =
  9. 9.21 × 8 =
  10. 10.27 × 8 =
  11. 11.69 × 4 =
  12. 12.50 × 4 =
  13. 13.39 × 8 =
  14. 14.14 × 4 =
  15. 15.25 × 8 =
  16. 16.60 × 4 =
  17. 17.29 × 8 =
  18. 18.26 × 4 =
  19. 19.55 × 4 =
  20. 20.37 × 8 =
  21. 21.26 × 8 =
  22. 22.34 × 8 =
  23. 23.13 × 8 =
  24. 24.36 × 8 =
  25. 25.24 × 8 =
  26. 26.65 × 4 =
  27. 27.52 × 4 =
  28. 28.30 × 8 =
  29. 29.25 × 4 =
  30. 30.23 × 4 =
  31. 31.31 × 8 =
  32. 32.40 × 4 =
  33. 33.36 × 4 =
  34. 34.53 × 4 =
  35. 35.30 × 4 =
  36. 36.70 × 4 =
  37. 37.74 × 4 =
  38. 38.24 × 4 =
  39. 39.46 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 320
  2. 252
  3. 256
  4. 280
  5. 112
  6. 176
  7. 236
  8. 96
  9. 168
  10. 216
  11. 276
  12. 200
  13. 312
  14. 56
  15. 200
  16. 240
  17. 232
  18. 104
  19. 220
  20. 296
  21. 208
  22. 272
  23. 104
  24. 288
  25. 192
  26. 260
  27. 208
  28. 240
  29. 100
  30. 92
  31. 248
  32. 160
  33. 144
  34. 212
  35. 120
  36. 280
  37. 296
  38. 96
  39. 184
  40. 288

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