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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 744 · 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. 1.37 × 4 =
  2. 2.74 × 4 =
  3. 3.37 × 8 =
  4. 4.27 × 8 =
  5. 5.45 × 4 =
  6. 6.50 × 4 =
  7. 7.33 × 8 =
  8. 8.15 × 8 =
  9. 9.23 × 4 =
  10. 10.14 × 8 =
  11. 11.16 × 8 =
  12. 12.28 × 8 =
  13. 13.33 × 4 =
  14. 14.22 × 8 =
  15. 15.68 × 4 =
  16. 16.38 × 4 =
  17. 17.32 × 8 =
  18. 18.41 × 4 =
  19. 19.12 × 8 =
  20. 20.39 × 8 =
  21. 21.26 × 8 =
  22. 22.18 × 8 =
  23. 23.20 × 4 =
  24. 24.69 × 4 =
  25. 25.52 × 4 =
  26. 26.71 × 4 =
  27. 27.19 × 4 =
  28. 28.62 × 4 =
  29. 29.20 × 8 =
  30. 30.25 × 8 =
  31. 31.34 × 8 =
  32. 32.53 × 4 =
  33. 33.21 × 8 =
  34. 34.30 × 4 =
  35. 35.61 × 4 =
  36. 36.17 × 8 =
  37. 37.63 × 4 =
  38. 38.72 × 4 =
  39. 39.42 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 148
  2. 296
  3. 296
  4. 216
  5. 180
  6. 200
  7. 264
  8. 120
  9. 92
  10. 112
  11. 128
  12. 224
  13. 132
  14. 176
  15. 272
  16. 152
  17. 256
  18. 164
  19. 96
  20. 312
  21. 208
  22. 144
  23. 80
  24. 276
  25. 208
  26. 284
  27. 76
  28. 248
  29. 160
  30. 200
  31. 272
  32. 212
  33. 168
  34. 120
  35. 244
  36. 136
  37. 252
  38. 288
  39. 168
  40. 56

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