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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 155 · 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. 1.21 × 4 =
  2. 2.12 × 8 =
  3. 3.56 × 4 =
  4. 4.51 × 4 =
  5. 5.25 × 8 =
  6. 6.19 × 4 =
  7. 7.72 × 4 =
  8. 8.70 × 4 =
  9. 9.18 × 8 =
  10. 10.40 × 8 =
  11. 11.26 × 4 =
  12. 12.22 × 8 =
  13. 13.14 × 8 =
  14. 14.32 × 8 =
  15. 15.34 × 8 =
  16. 16.62 × 4 =
  17. 17.61 × 4 =
  18. 18.23 × 8 =
  19. 19.39 × 8 =
  20. 20.66 × 4 =
  21. 21.22 × 4 =
  22. 22.68 × 4 =
  23. 23.18 × 4 =
  24. 24.35 × 8 =
  25. 25.36 × 4 =
  26. 26.63 × 4 =
  27. 27.54 × 4 =
  28. 28.13 × 8 =
  29. 29.69 × 4 =
  30. 30.39 × 4 =
  31. 31.24 × 8 =
  32. 32.24 × 4 =
  33. 33.55 × 4 =
  34. 34.42 × 4 =
  35. 35.67 × 4 =
  36. 36.74 × 4 =
  37. 37.53 × 4 =
  38. 38.38 × 8 =
  39. 39.59 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 84
  2. 96
  3. 224
  4. 204
  5. 200
  6. 76
  7. 288
  8. 280
  9. 144
  10. 320
  11. 104
  12. 176
  13. 112
  14. 256
  15. 272
  16. 248
  17. 244
  18. 184
  19. 312
  20. 264
  21. 88
  22. 272
  23. 72
  24. 280
  25. 144
  26. 252
  27. 216
  28. 104
  29. 276
  30. 156
  31. 192
  32. 96
  33. 220
  34. 168
  35. 268
  36. 296
  37. 212
  38. 304
  39. 236
  40. 288

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