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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 324 · 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. 1.48 × 4 =
  2. 2.44 × 4 =
  3. 3.14 × 4 =
  4. 4.61 × 4 =
  5. 5.38 × 4 =
  6. 6.65 × 4 =
  7. 7.24 × 8 =
  8. 8.13 × 4 =
  9. 9.28 × 8 =
  10. 10.12 × 8 =
  11. 11.54 × 4 =
  12. 12.34 × 8 =
  13. 13.64 × 4 =
  14. 14.50 × 4 =
  15. 15.35 × 8 =
  16. 16.30 × 4 =
  17. 17.43 × 4 =
  18. 18.25 × 8 =
  19. 19.30 × 8 =
  20. 20.15 × 4 =
  21. 21.40 × 4 =
  22. 22.16 × 4 =
  23. 23.63 × 4 =
  24. 24.62 × 4 =
  25. 25.39 × 8 =
  26. 26.36 × 8 =
  27. 27.15 × 8 =
  28. 28.34 × 4 =
  29. 29.16 × 8 =
  30. 30.21 × 4 =
  31. 31.41 × 4 =
  32. 32.74 × 4 =
  33. 33.46 × 4 =
  34. 34.12 × 4 =
  35. 35.31 × 8 =
  36. 36.23 × 4 =
  37. 37.18 × 8 =
  38. 38.32 × 8 =
  39. 39.45 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 192
  2. 176
  3. 56
  4. 244
  5. 152
  6. 260
  7. 192
  8. 52
  9. 224
  10. 96
  11. 216
  12. 272
  13. 256
  14. 200
  15. 280
  16. 120
  17. 172
  18. 200
  19. 240
  20. 60
  21. 160
  22. 64
  23. 252
  24. 248
  25. 312
  26. 288
  27. 120
  28. 136
  29. 128
  30. 84
  31. 164
  32. 296
  33. 184
  34. 48
  35. 248
  36. 92
  37. 144
  38. 256
  39. 180
  40. 292

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