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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 229 · 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. 1.37 × 8 =
  2. 2.47 × 4 =
  3. 3.13 × 8 =
  4. 4.27 × 8 =
  5. 5.31 × 4 =
  6. 6.16 × 4 =
  7. 7.50 × 4 =
  8. 8.33 × 8 =
  9. 9.24 × 8 =
  10. 10.66 × 4 =
  11. 11.42 × 4 =
  12. 12.44 × 4 =
  13. 13.23 × 8 =
  14. 14.59 × 4 =
  15. 15.56 × 4 =
  16. 16.29 × 8 =
  17. 17.19 × 8 =
  18. 18.30 × 4 =
  19. 19.75 × 4 =
  20. 20.12 × 8 =
  21. 21.67 × 4 =
  22. 22.52 × 4 =
  23. 23.32 × 8 =
  24. 24.26 × 8 =
  25. 25.25 × 8 =
  26. 26.31 × 8 =
  27. 27.24 × 4 =
  28. 28.22 × 4 =
  29. 29.74 × 4 =
  30. 30.36 × 8 =
  31. 31.71 × 4 =
  32. 32.49 × 4 =
  33. 33.72 × 4 =
  34. 34.17 × 8 =
  35. 35.30 × 8 =
  36. 36.39 × 4 =
  37. 37.28 × 4 =
  38. 38.68 × 4 =
  39. 39.28 × 8 =
  40. 40.29 × 4 =

Answer key

  1. 296
  2. 188
  3. 104
  4. 216
  5. 124
  6. 64
  7. 200
  8. 264
  9. 192
  10. 264
  11. 168
  12. 176
  13. 184
  14. 236
  15. 224
  16. 232
  17. 152
  18. 120
  19. 300
  20. 96
  21. 268
  22. 208
  23. 256
  24. 208
  25. 200
  26. 248
  27. 96
  28. 88
  29. 296
  30. 288
  31. 284
  32. 196
  33. 288
  34. 136
  35. 240
  36. 156
  37. 112
  38. 272
  39. 224
  40. 116

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