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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 761 · 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. 2.73 × 4 =
  3. 3.23 × 4 =
  4. 4.69 × 4 =
  5. 5.21 × 4 =
  6. 6.30 × 8 =
  7. 7.63 × 4 =
  8. 8.39 × 8 =
  9. 9.68 × 4 =
  10. 10.27 × 8 =
  11. 11.12 × 4 =
  12. 12.19 × 8 =
  13. 13.41 × 4 =
  14. 14.71 × 4 =
  15. 15.16 × 8 =
  16. 16.20 × 4 =
  17. 17.38 × 4 =
  18. 18.26 × 8 =
  19. 19.72 × 4 =
  20. 20.17 × 4 =
  21. 21.45 × 4 =
  22. 22.17 × 8 =
  23. 23.21 × 8 =
  24. 24.58 × 4 =
  25. 25.67 × 4 =
  26. 26.31 × 8 =
  27. 27.12 × 8 =
  28. 28.56 × 4 =
  29. 29.26 × 4 =
  30. 30.37 × 4 =
  31. 31.46 × 4 =
  32. 32.66 × 4 =
  33. 33.36 × 8 =
  34. 34.54 × 4 =
  35. 35.40 × 8 =
  36. 36.43 × 4 =
  37. 37.13 × 8 =
  38. 38.22 × 8 =
  39. 39.13 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 296
  2. 292
  3. 92
  4. 276
  5. 84
  6. 240
  7. 252
  8. 312
  9. 272
  10. 216
  11. 48
  12. 152
  13. 164
  14. 284
  15. 128
  16. 80
  17. 152
  18. 208
  19. 288
  20. 68
  21. 180
  22. 136
  23. 168
  24. 232
  25. 268
  26. 248
  27. 96
  28. 224
  29. 104
  30. 148
  31. 184
  32. 264
  33. 288
  34. 216
  35. 320
  36. 172
  37. 104
  38. 176
  39. 52
  40. 224

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