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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 417 · 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. 1.30 × 8 =
  2. 2.20 × 8 =
  3. 3.31 × 4 =
  4. 4.31 × 8 =
  5. 5.18 × 8 =
  6. 6.12 × 4 =
  7. 7.34 × 8 =
  8. 8.48 × 4 =
  9. 9.21 × 8 =
  10. 10.49 × 4 =
  11. 11.25 × 8 =
  12. 12.75 × 4 =
  13. 13.29 × 8 =
  14. 14.34 × 4 =
  15. 15.13 × 8 =
  16. 16.66 × 4 =
  17. 17.21 × 4 =
  18. 18.50 × 4 =
  19. 19.38 × 4 =
  20. 20.40 × 4 =
  21. 21.52 × 4 =
  22. 22.26 × 8 =
  23. 23.64 × 4 =
  24. 24.32 × 8 =
  25. 25.19 × 4 =
  26. 26.43 × 4 =
  27. 27.45 × 4 =
  28. 28.16 × 4 =
  29. 29.72 × 4 =
  30. 30.26 × 4 =
  31. 31.63 × 4 =
  32. 32.39 × 8 =
  33. 33.37 × 8 =
  34. 34.65 × 4 =
  35. 35.46 × 4 =
  36. 36.28 × 8 =
  37. 37.41 × 4 =
  38. 38.55 × 4 =
  39. 39.16 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 240
  2. 160
  3. 124
  4. 248
  5. 144
  6. 48
  7. 272
  8. 192
  9. 168
  10. 196
  11. 200
  12. 300
  13. 232
  14. 136
  15. 104
  16. 264
  17. 84
  18. 200
  19. 152
  20. 160
  21. 208
  22. 208
  23. 256
  24. 256
  25. 76
  26. 172
  27. 180
  28. 64
  29. 288
  30. 104
  31. 252
  32. 312
  33. 296
  34. 260
  35. 184
  36. 224
  37. 164
  38. 220
  39. 128
  40. 56

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