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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 369 · 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. 1.15 × 8 =
  2. 2.64 × 4 =
  3. 3.34 × 4 =
  4. 4.31 × 8 =
  5. 5.28 × 8 =
  6. 6.15 × 4 =
  7. 7.37 × 8 =
  8. 8.47 × 4 =
  9. 9.74 × 4 =
  10. 10.26 × 8 =
  11. 11.30 × 4 =
  12. 12.57 × 4 =
  13. 13.13 × 4 =
  14. 14.70 × 4 =
  15. 15.39 × 4 =
  16. 16.13 × 8 =
  17. 17.28 × 4 =
  18. 18.32 × 4 =
  19. 19.65 × 4 =
  20. 20.26 × 4 =
  21. 21.17 × 8 =
  22. 22.30 × 8 =
  23. 23.29 × 8 =
  24. 24.31 × 4 =
  25. 25.16 × 8 =
  26. 26.63 × 4 =
  27. 27.34 × 8 =
  28. 28.49 × 4 =
  29. 29.66 × 4 =
  30. 30.23 × 4 =
  31. 31.24 × 4 =
  32. 32.38 × 8 =
  33. 33.58 × 4 =
  34. 34.24 × 8 =
  35. 35.35 × 4 =
  36. 36.27 × 8 =
  37. 37.14 × 4 =
  38. 38.67 × 4 =
  39. 39.12 × 8 =
  40. 40.75 × 4 =

Answer key

  1. 120
  2. 256
  3. 136
  4. 248
  5. 224
  6. 60
  7. 296
  8. 188
  9. 296
  10. 208
  11. 120
  12. 228
  13. 52
  14. 280
  15. 156
  16. 104
  17. 112
  18. 128
  19. 260
  20. 104
  21. 136
  22. 240
  23. 232
  24. 124
  25. 128
  26. 252
  27. 272
  28. 196
  29. 264
  30. 92
  31. 96
  32. 304
  33. 232
  34. 192
  35. 140
  36. 216
  37. 56
  38. 268
  39. 96
  40. 300

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