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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 231 · 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. 1.33 × 4 =
  2. 2.31 × 4 =
  3. 3.25 × 8 =
  4. 4.29 × 8 =
  5. 5.15 × 8 =
  6. 6.20 × 4 =
  7. 7.43 × 4 =
  8. 8.52 × 4 =
  9. 9.36 × 4 =
  10. 10.48 × 4 =
  11. 11.56 × 4 =
  12. 12.39 × 8 =
  13. 13.70 × 4 =
  14. 14.27 × 8 =
  15. 15.28 × 8 =
  16. 16.19 × 4 =
  17. 17.41 × 4 =
  18. 18.21 × 8 =
  19. 19.36 × 8 =
  20. 20.63 × 4 =
  21. 21.71 × 4 =
  22. 22.18 × 4 =
  23. 23.33 × 8 =
  24. 24.34 × 8 =
  25. 25.13 × 8 =
  26. 26.37 × 8 =
  27. 27.60 × 4 =
  28. 28.30 × 4 =
  29. 29.26 × 4 =
  30. 30.39 × 4 =
  31. 31.31 × 8 =
  32. 32.75 × 4 =
  33. 33.16 × 8 =
  34. 34.14 × 8 =
  35. 35.55 × 4 =
  36. 36.67 × 4 =
  37. 37.32 × 4 =
  38. 38.40 × 4 =
  39. 39.20 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 132
  2. 124
  3. 200
  4. 232
  5. 120
  6. 80
  7. 172
  8. 208
  9. 144
  10. 192
  11. 224
  12. 312
  13. 280
  14. 216
  15. 224
  16. 76
  17. 164
  18. 168
  19. 288
  20. 252
  21. 284
  22. 72
  23. 264
  24. 272
  25. 104
  26. 296
  27. 240
  28. 120
  29. 104
  30. 156
  31. 248
  32. 300
  33. 128
  34. 112
  35. 220
  36. 268
  37. 128
  38. 160
  39. 160
  40. 152

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