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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 425 · 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. 1.24 × 8 =
  2. 2.25 × 4 =
  3. 3.34 × 8 =
  4. 4.31 × 4 =
  5. 5.26 × 8 =
  6. 6.23 × 4 =
  7. 7.37 × 8 =
  8. 8.28 × 8 =
  9. 9.63 × 4 =
  10. 10.31 × 8 =
  11. 11.12 × 8 =
  12. 12.13 × 8 =
  13. 13.53 × 4 =
  14. 14.14 × 4 =
  15. 15.67 × 4 =
  16. 16.29 × 4 =
  17. 17.48 × 4 =
  18. 18.19 × 8 =
  19. 19.36 × 8 =
  20. 20.56 × 4 =
  21. 21.30 × 4 =
  22. 22.15 × 8 =
  23. 23.21 × 8 =
  24. 24.33 × 8 =
  25. 25.33 × 4 =
  26. 26.18 × 4 =
  27. 27.39 × 8 =
  28. 28.52 × 4 =
  29. 29.39 × 4 =
  30. 30.35 × 4 =
  31. 31.43 × 4 =
  32. 32.71 × 4 =
  33. 33.73 × 4 =
  34. 34.30 × 8 =
  35. 35.29 × 8 =
  36. 36.75 × 4 =
  37. 37.16 × 8 =
  38. 38.41 × 4 =
  39. 39.20 × 8 =
  40. 40.23 × 8 =

Answer key

  1. 192
  2. 100
  3. 272
  4. 124
  5. 208
  6. 92
  7. 296
  8. 224
  9. 252
  10. 248
  11. 96
  12. 104
  13. 212
  14. 56
  15. 268
  16. 116
  17. 192
  18. 152
  19. 288
  20. 224
  21. 120
  22. 120
  23. 168
  24. 264
  25. 132
  26. 72
  27. 312
  28. 208
  29. 156
  30. 140
  31. 172
  32. 284
  33. 292
  34. 240
  35. 232
  36. 300
  37. 128
  38. 164
  39. 160
  40. 184

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