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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 385 · 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. 1.24 × 8 =
  2. 2.29 × 4 =
  3. 3.19 × 8 =
  4. 4.71 × 4 =
  5. 5.40 × 8 =
  6. 6.30 × 4 =
  7. 7.17 × 4 =
  8. 8.27 × 8 =
  9. 9.40 × 4 =
  10. 10.20 × 8 =
  11. 11.33 × 4 =
  12. 12.68 × 4 =
  13. 13.13 × 8 =
  14. 14.18 × 8 =
  15. 15.17 × 8 =
  16. 16.56 × 4 =
  17. 17.67 × 4 =
  18. 18.35 × 8 =
  19. 19.21 × 4 =
  20. 20.26 × 4 =
  21. 21.38 × 8 =
  22. 22.42 × 4 =
  23. 23.20 × 4 =
  24. 24.54 × 4 =
  25. 25.39 × 4 =
  26. 26.32 × 8 =
  27. 27.12 × 8 =
  28. 28.59 × 4 =
  29. 29.33 × 8 =
  30. 30.18 × 4 =
  31. 31.22 × 8 =
  32. 32.16 × 8 =
  33. 33.69 × 4 =
  34. 34.29 × 8 =
  35. 35.46 × 4 =
  36. 36.75 × 4 =
  37. 37.48 × 4 =
  38. 38.49 × 4 =
  39. 39.35 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 192
  2. 116
  3. 152
  4. 284
  5. 320
  6. 120
  7. 68
  8. 216
  9. 160
  10. 160
  11. 132
  12. 272
  13. 104
  14. 144
  15. 136
  16. 224
  17. 268
  18. 280
  19. 84
  20. 104
  21. 304
  22. 168
  23. 80
  24. 216
  25. 156
  26. 256
  27. 96
  28. 236
  29. 264
  30. 72
  31. 176
  32. 128
  33. 276
  34. 232
  35. 184
  36. 300
  37. 192
  38. 196
  39. 140
  40. 312

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