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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 102 · 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. 1.31 × 8 =
  2. 2.49 × 4 =
  3. 3.42 × 4 =
  4. 4.74 × 4 =
  5. 5.61 × 4 =
  6. 6.23 × 4 =
  7. 7.24 × 8 =
  8. 8.14 × 8 =
  9. 9.37 × 4 =
  10. 10.13 × 8 =
  11. 11.16 × 4 =
  12. 12.67 × 4 =
  13. 13.36 × 4 =
  14. 14.35 × 8 =
  15. 15.23 × 8 =
  16. 16.58 × 4 =
  17. 17.19 × 8 =
  18. 18.62 × 4 =
  19. 19.40 × 8 =
  20. 20.41 × 4 =
  21. 21.32 × 4 =
  22. 22.12 × 4 =
  23. 23.75 × 4 =
  24. 24.54 × 4 =
  25. 25.34 × 8 =
  26. 26.16 × 8 =
  27. 27.22 × 8 =
  28. 28.50 × 4 =
  29. 29.21 × 4 =
  30. 30.68 × 4 =
  31. 31.72 × 4 =
  32. 32.43 × 4 =
  33. 33.15 × 4 =
  34. 34.31 × 4 =
  35. 35.34 × 4 =
  36. 36.18 × 8 =
  37. 37.17 × 8 =
  38. 38.29 × 8 =
  39. 39.38 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 248
  2. 196
  3. 168
  4. 296
  5. 244
  6. 92
  7. 192
  8. 112
  9. 148
  10. 104
  11. 64
  12. 268
  13. 144
  14. 280
  15. 184
  16. 232
  17. 152
  18. 248
  19. 320
  20. 164
  21. 128
  22. 48
  23. 300
  24. 216
  25. 272
  26. 128
  27. 176
  28. 200
  29. 84
  30. 272
  31. 288
  32. 172
  33. 60
  34. 124
  35. 136
  36. 144
  37. 136
  38. 232
  39. 304
  40. 264

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