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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 784 · 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. 1.53 × 4 =
  2. 2.30 × 4 =
  3. 3.13 × 8 =
  4. 4.24 × 8 =
  5. 5.15 × 4 =
  6. 6.25 × 4 =
  7. 7.35 × 8 =
  8. 8.37 × 8 =
  9. 9.47 × 4 =
  10. 10.21 × 4 =
  11. 11.30 × 8 =
  12. 12.27 × 4 =
  13. 13.39 × 4 =
  14. 14.31 × 8 =
  15. 15.27 × 8 =
  16. 16.17 × 8 =
  17. 17.40 × 4 =
  18. 18.38 × 8 =
  19. 19.58 × 4 =
  20. 20.36 × 8 =
  21. 21.12 × 8 =
  22. 22.34 × 8 =
  23. 23.40 × 8 =
  24. 24.23 × 4 =
  25. 25.26 × 8 =
  26. 26.43 × 4 =
  27. 27.62 × 4 =
  28. 28.19 × 8 =
  29. 29.15 × 8 =
  30. 30.29 × 4 =
  31. 31.46 × 4 =
  32. 32.21 × 8 =
  33. 33.18 × 8 =
  34. 34.16 × 8 =
  35. 35.20 × 8 =
  36. 36.22 × 8 =
  37. 37.39 × 8 =
  38. 38.25 × 8 =
  39. 39.54 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 212
  2. 120
  3. 104
  4. 192
  5. 60
  6. 100
  7. 280
  8. 296
  9. 188
  10. 84
  11. 240
  12. 108
  13. 156
  14. 248
  15. 216
  16. 136
  17. 160
  18. 304
  19. 232
  20. 288
  21. 96
  22. 272
  23. 320
  24. 92
  25. 208
  26. 172
  27. 248
  28. 152
  29. 120
  30. 116
  31. 184
  32. 168
  33. 144
  34. 128
  35. 160
  36. 176
  37. 312
  38. 200
  39. 216
  40. 252

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