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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 658 · 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. 1.12 × 4 =
  2. 2.29 × 4 =
  3. 3.16 × 8 =
  4. 4.42 × 4 =
  5. 5.66 × 4 =
  6. 6.33 × 8 =
  7. 7.71 × 4 =
  8. 8.63 × 4 =
  9. 9.19 × 8 =
  10. 10.22 × 8 =
  11. 11.25 × 4 =
  12. 12.14 × 8 =
  13. 13.28 × 4 =
  14. 14.68 × 4 =
  15. 15.56 × 4 =
  16. 16.36 × 4 =
  17. 17.34 × 8 =
  18. 18.34 × 4 =
  19. 19.14 × 4 =
  20. 20.17 × 8 =
  21. 21.30 × 4 =
  22. 22.58 × 4 =
  23. 23.12 × 8 =
  24. 24.43 × 4 =
  25. 25.61 × 4 =
  26. 26.32 × 8 =
  27. 27.28 × 8 =
  28. 28.27 × 8 =
  29. 29.72 × 4 =
  30. 30.15 × 4 =
  31. 31.19 × 4 =
  32. 32.26 × 8 =
  33. 33.23 × 4 =
  34. 34.49 × 4 =
  35. 35.36 × 8 =
  36. 36.21 × 4 =
  37. 37.46 × 4 =
  38. 38.32 × 4 =
  39. 39.40 × 4 =
  40. 40.13 × 4 =

Answer key

  1. 48
  2. 116
  3. 128
  4. 168
  5. 264
  6. 264
  7. 284
  8. 252
  9. 152
  10. 176
  11. 100
  12. 112
  13. 112
  14. 272
  15. 224
  16. 144
  17. 272
  18. 136
  19. 56
  20. 136
  21. 120
  22. 232
  23. 96
  24. 172
  25. 244
  26. 256
  27. 224
  28. 216
  29. 288
  30. 60
  31. 76
  32. 208
  33. 92
  34. 196
  35. 288
  36. 84
  37. 184
  38. 128
  39. 160
  40. 52

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