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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 614 · 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. 1.28 × 8 =
  2. 2.20 × 4 =
  3. 3.74 × 4 =
  4. 4.36 × 4 =
  5. 5.39 × 4 =
  6. 6.42 × 4 =
  7. 7.32 × 4 =
  8. 8.34 × 8 =
  9. 9.39 × 8 =
  10. 10.19 × 8 =
  11. 11.25 × 8 =
  12. 12.18 × 8 =
  13. 13.68 × 4 =
  14. 14.17 × 4 =
  15. 15.75 × 4 =
  16. 16.50 × 4 =
  17. 17.49 × 4 =
  18. 18.16 × 4 =
  19. 19.55 × 4 =
  20. 20.24 × 8 =
  21. 21.27 × 4 =
  22. 22.31 × 4 =
  23. 23.17 × 8 =
  24. 24.19 × 4 =
  25. 25.44 × 4 =
  26. 26.12 × 8 =
  27. 27.29 × 8 =
  28. 28.25 × 4 =
  29. 29.62 × 4 =
  30. 30.26 × 4 =
  31. 31.64 × 4 =
  32. 32.40 × 8 =
  33. 33.53 × 4 =
  34. 34.37 × 8 =
  35. 35.72 × 4 =
  36. 36.20 × 8 =
  37. 37.59 × 4 =
  38. 38.57 × 4 =
  39. 39.13 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 224
  2. 80
  3. 296
  4. 144
  5. 156
  6. 168
  7. 128
  8. 272
  9. 312
  10. 152
  11. 200
  12. 144
  13. 272
  14. 68
  15. 300
  16. 200
  17. 196
  18. 64
  19. 220
  20. 192
  21. 108
  22. 124
  23. 136
  24. 76
  25. 176
  26. 96
  27. 232
  28. 100
  29. 248
  30. 104
  31. 256
  32. 320
  33. 212
  34. 296
  35. 288
  36. 160
  37. 236
  38. 228
  39. 52
  40. 184

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