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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 313 · 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. 1.45 × 4 =
  2. 2.21 × 4 =
  3. 3.15 × 4 =
  4. 4.28 × 4 =
  5. 5.31 × 8 =
  6. 6.20 × 8 =
  7. 7.22 × 8 =
  8. 8.38 × 8 =
  9. 9.34 × 8 =
  10. 10.12 × 8 =
  11. 11.39 × 8 =
  12. 12.59 × 4 =
  13. 13.30 × 8 =
  14. 14.27 × 4 =
  15. 15.16 × 8 =
  16. 16.21 × 8 =
  17. 17.48 × 4 =
  18. 18.35 × 8 =
  19. 19.43 × 4 =
  20. 20.18 × 4 =
  21. 21.25 × 8 =
  22. 22.36 × 8 =
  23. 23.17 × 4 =
  24. 24.24 × 8 =
  25. 25.73 × 4 =
  26. 26.52 × 4 =
  27. 27.65 × 4 =
  28. 28.19 × 8 =
  29. 29.57 × 4 =
  30. 30.32 × 8 =
  31. 31.69 × 4 =
  32. 32.50 × 4 =
  33. 33.66 × 4 =
  34. 34.46 × 4 =
  35. 35.68 × 4 =
  36. 36.55 × 4 =
  37. 37.56 × 4 =
  38. 38.51 × 4 =
  39. 39.71 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 180
  2. 84
  3. 60
  4. 112
  5. 248
  6. 160
  7. 176
  8. 304
  9. 272
  10. 96
  11. 312
  12. 236
  13. 240
  14. 108
  15. 128
  16. 168
  17. 192
  18. 280
  19. 172
  20. 72
  21. 200
  22. 288
  23. 68
  24. 192
  25. 292
  26. 208
  27. 260
  28. 152
  29. 228
  30. 256
  31. 276
  32. 200
  33. 264
  34. 184
  35. 272
  36. 220
  37. 224
  38. 204
  39. 284
  40. 104

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