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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 669 · 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. 1.27 × 4 =
  2. 2.33 × 4 =
  3. 3.25 × 4 =
  4. 4.24 × 8 =
  5. 5.70 × 4 =
  6. 6.25 × 8 =
  7. 7.73 × 4 =
  8. 8.15 × 8 =
  9. 9.57 × 4 =
  10. 10.51 × 4 =
  11. 11.22 × 4 =
  12. 12.17 × 8 =
  13. 13.67 × 4 =
  14. 14.62 × 4 =
  15. 15.26 × 8 =
  16. 16.65 × 4 =
  17. 17.13 × 4 =
  18. 18.71 × 4 =
  19. 19.26 × 4 =
  20. 20.12 × 8 =
  21. 21.54 × 4 =
  22. 22.20 × 4 =
  23. 23.32 × 4 =
  24. 24.20 × 8 =
  25. 25.16 × 8 =
  26. 26.37 × 8 =
  27. 27.19 × 4 =
  28. 28.41 × 4 =
  29. 29.42 × 4 =
  30. 30.15 × 4 =
  31. 31.66 × 4 =
  32. 32.55 × 4 =
  33. 33.59 × 4 =
  34. 34.61 × 4 =
  35. 35.23 × 8 =
  36. 36.44 × 4 =
  37. 37.36 × 4 =
  38. 38.27 × 8 =
  39. 39.43 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 108
  2. 132
  3. 100
  4. 192
  5. 280
  6. 200
  7. 292
  8. 120
  9. 228
  10. 204
  11. 88
  12. 136
  13. 268
  14. 248
  15. 208
  16. 260
  17. 52
  18. 284
  19. 104
  20. 96
  21. 216
  22. 80
  23. 128
  24. 160
  25. 128
  26. 296
  27. 76
  28. 164
  29. 168
  30. 60
  31. 264
  32. 220
  33. 236
  34. 244
  35. 184
  36. 176
  37. 144
  38. 216
  39. 172
  40. 176

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