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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 679 · 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. 2.25 × 8 =
  3. 3.57 × 4 =
  4. 4.33 × 8 =
  5. 5.27 × 8 =
  6. 6.66 × 4 =
  7. 7.38 × 4 =
  8. 8.29 × 4 =
  9. 9.38 × 8 =
  10. 10.29 × 8 =
  11. 11.37 × 8 =
  12. 12.23 × 8 =
  13. 13.34 × 8 =
  14. 14.56 × 4 =
  15. 15.13 × 8 =
  16. 16.39 × 4 =
  17. 17.15 × 8 =
  18. 18.16 × 8 =
  19. 19.14 × 8 =
  20. 20.25 × 4 =
  21. 21.21 × 8 =
  22. 22.19 × 8 =
  23. 23.39 × 8 =
  24. 24.63 × 4 =
  25. 25.70 × 4 =
  26. 26.13 × 4 =
  27. 27.21 × 4 =
  28. 28.67 × 4 =
  29. 29.58 × 4 =
  30. 30.34 × 4 =
  31. 31.24 × 8 =
  32. 32.42 × 4 =
  33. 33.35 × 8 =
  34. 34.18 × 8 =
  35. 35.30 × 8 =
  36. 36.52 × 4 =
  37. 37.49 × 4 =
  38. 38.24 × 4 =
  39. 39.40 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 180
  2. 200
  3. 228
  4. 264
  5. 216
  6. 264
  7. 152
  8. 116
  9. 304
  10. 232
  11. 296
  12. 184
  13. 272
  14. 224
  15. 104
  16. 156
  17. 120
  18. 128
  19. 112
  20. 100
  21. 168
  22. 152
  23. 312
  24. 252
  25. 280
  26. 52
  27. 84
  28. 268
  29. 232
  30. 136
  31. 192
  32. 168
  33. 280
  34. 144
  35. 240
  36. 208
  37. 196
  38. 96
  39. 320
  40. 224

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