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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 354 · 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. 1.46 × 4 =
  2. 2.34 × 8 =
  3. 3.26 × 8 =
  4. 4.53 × 4 =
  5. 5.28 × 8 =
  6. 6.33 × 8 =
  7. 7.39 × 8 =
  8. 8.38 × 8 =
  9. 9.25 × 8 =
  10. 10.28 × 4 =
  11. 11.36 × 8 =
  12. 12.62 × 4 =
  13. 13.49 × 4 =
  14. 14.57 × 4 =
  15. 15.19 × 8 =
  16. 16.71 × 4 =
  17. 17.17 × 4 =
  18. 18.16 × 8 =
  19. 19.37 × 8 =
  20. 20.72 × 4 =
  21. 21.23 × 8 =
  22. 22.54 × 4 =
  23. 23.29 × 8 =
  24. 24.34 × 4 =
  25. 25.12 × 8 =
  26. 26.56 × 4 =
  27. 27.38 × 4 =
  28. 28.20 × 8 =
  29. 29.27 × 8 =
  30. 30.31 × 4 =
  31. 31.32 × 8 =
  32. 32.12 × 4 =
  33. 33.15 × 4 =
  34. 34.67 × 4 =
  35. 35.40 × 8 =
  36. 36.61 × 4 =
  37. 37.41 × 4 =
  38. 38.24 × 8 =
  39. 39.30 × 4 =
  40. 40.39 × 4 =

Answer key

  1. 184
  2. 272
  3. 208
  4. 212
  5. 224
  6. 264
  7. 312
  8. 304
  9. 200
  10. 112
  11. 288
  12. 248
  13. 196
  14. 228
  15. 152
  16. 284
  17. 68
  18. 128
  19. 296
  20. 288
  21. 184
  22. 216
  23. 232
  24. 136
  25. 96
  26. 224
  27. 152
  28. 160
  29. 216
  30. 124
  31. 256
  32. 48
  33. 60
  34. 268
  35. 320
  36. 244
  37. 164
  38. 192
  39. 120
  40. 156

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