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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 304 · 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. 1.13 × 4 =
  2. 2.31 × 4 =
  3. 3.43 × 4 =
  4. 4.20 × 8 =
  5. 5.18 × 4 =
  6. 6.54 × 4 =
  7. 7.36 × 8 =
  8. 8.68 × 4 =
  9. 9.38 × 8 =
  10. 10.25 × 4 =
  11. 11.49 × 4 =
  12. 12.64 × 4 =
  13. 13.22 × 4 =
  14. 14.32 × 4 =
  15. 15.33 × 8 =
  16. 16.25 × 8 =
  17. 17.16 × 8 =
  18. 18.55 × 4 =
  19. 19.63 × 4 =
  20. 20.72 × 4 =
  21. 21.44 × 4 =
  22. 22.18 × 8 =
  23. 23.34 × 4 =
  24. 24.15 × 4 =
  25. 25.74 × 4 =
  26. 26.53 × 4 =
  27. 27.34 × 8 =
  28. 28.42 × 4 =
  29. 29.61 × 4 =
  30. 30.67 × 4 =
  31. 31.29 × 8 =
  32. 32.23 × 8 =
  33. 33.15 × 8 =
  34. 34.24 × 4 =
  35. 35.28 × 4 =
  36. 36.37 × 8 =
  37. 37.20 × 4 =
  38. 38.56 × 4 =
  39. 39.27 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 52
  2. 124
  3. 172
  4. 160
  5. 72
  6. 216
  7. 288
  8. 272
  9. 304
  10. 100
  11. 196
  12. 256
  13. 88
  14. 128
  15. 264
  16. 200
  17. 128
  18. 220
  19. 252
  20. 288
  21. 176
  22. 144
  23. 136
  24. 60
  25. 296
  26. 212
  27. 272
  28. 168
  29. 244
  30. 268
  31. 232
  32. 184
  33. 120
  34. 96
  35. 112
  36. 296
  37. 80
  38. 224
  39. 216
  40. 224

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