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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 788 · 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. 1.26 × 8 =
  2. 2.74 × 4 =
  3. 3.39 × 8 =
  4. 4.26 × 4 =
  5. 5.55 × 4 =
  6. 6.32 × 8 =
  7. 7.12 × 8 =
  8. 8.14 × 8 =
  9. 9.68 × 4 =
  10. 10.24 × 4 =
  11. 11.34 × 4 =
  12. 12.42 × 4 =
  13. 13.37 × 8 =
  14. 14.45 × 4 =
  15. 15.27 × 8 =
  16. 16.47 × 4 =
  17. 17.66 × 4 =
  18. 18.33 × 8 =
  19. 19.38 × 4 =
  20. 20.43 × 4 =
  21. 21.71 × 4 =
  22. 22.44 × 4 =
  23. 23.38 × 8 =
  24. 24.25 × 4 =
  25. 25.72 × 4 =
  26. 26.57 × 4 =
  27. 27.16 × 4 =
  28. 28.28 × 8 =
  29. 29.15 × 4 =
  30. 30.24 × 8 =
  31. 31.30 × 8 =
  32. 32.67 × 4 =
  33. 33.17 × 8 =
  34. 34.73 × 4 =
  35. 35.37 × 4 =
  36. 36.53 × 4 =
  37. 37.20 × 8 =
  38. 38.22 × 8 =
  39. 39.19 × 8 =
  40. 40.31 × 8 =

Answer key

  1. 208
  2. 296
  3. 312
  4. 104
  5. 220
  6. 256
  7. 96
  8. 112
  9. 272
  10. 96
  11. 136
  12. 168
  13. 296
  14. 180
  15. 216
  16. 188
  17. 264
  18. 264
  19. 152
  20. 172
  21. 284
  22. 176
  23. 304
  24. 100
  25. 288
  26. 228
  27. 64
  28. 224
  29. 60
  30. 192
  31. 240
  32. 268
  33. 136
  34. 292
  35. 148
  36. 212
  37. 160
  38. 176
  39. 152
  40. 248

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