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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 663 · 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. 1.45 × 4 =
  2. 2.12 × 8 =
  3. 3.27 × 8 =
  4. 4.44 × 4 =
  5. 5.13 × 8 =
  6. 6.27 × 4 =
  7. 7.23 × 8 =
  8. 8.58 × 4 =
  9. 9.32 × 4 =
  10. 10.61 × 4 =
  11. 11.38 × 8 =
  12. 12.60 × 4 =
  13. 13.33 × 8 =
  14. 14.29 × 8 =
  15. 15.36 × 8 =
  16. 16.52 × 4 =
  17. 17.28 × 8 =
  18. 18.15 × 4 =
  19. 19.51 × 4 =
  20. 20.18 × 8 =
  21. 21.12 × 4 =
  22. 22.40 × 8 =
  23. 23.29 × 4 =
  24. 24.40 × 4 =
  25. 25.34 × 8 =
  26. 26.64 × 4 =
  27. 27.42 × 4 =
  28. 28.25 × 8 =
  29. 29.62 × 4 =
  30. 30.39 × 8 =
  31. 31.32 × 8 =
  32. 32.55 × 4 =
  33. 33.19 × 4 =
  34. 34.43 × 4 =
  35. 35.56 × 4 =
  36. 36.67 × 4 =
  37. 37.24 × 4 =
  38. 38.71 × 4 =
  39. 39.49 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 180
  2. 96
  3. 216
  4. 176
  5. 104
  6. 108
  7. 184
  8. 232
  9. 128
  10. 244
  11. 304
  12. 240
  13. 264
  14. 232
  15. 288
  16. 208
  17. 224
  18. 60
  19. 204
  20. 144
  21. 48
  22. 320
  23. 116
  24. 160
  25. 272
  26. 256
  27. 168
  28. 200
  29. 248
  30. 312
  31. 256
  32. 220
  33. 76
  34. 172
  35. 224
  36. 268
  37. 96
  38. 284
  39. 196
  40. 136

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