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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 448 · 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. 1.40 × 8 =
  2. 2.66 × 4 =
  3. 3.36 × 8 =
  4. 4.32 × 8 =
  5. 5.52 × 4 =
  6. 6.74 × 4 =
  7. 7.34 × 8 =
  8. 8.12 × 8 =
  9. 9.59 × 4 =
  10. 10.30 × 4 =
  11. 11.17 × 8 =
  12. 12.65 × 4 =
  13. 13.38 × 4 =
  14. 14.22 × 8 =
  15. 15.15 × 4 =
  16. 16.18 × 8 =
  17. 17.60 × 4 =
  18. 18.28 × 8 =
  19. 19.31 × 8 =
  20. 20.37 × 4 =
  21. 21.17 × 4 =
  22. 22.29 × 4 =
  23. 23.16 × 8 =
  24. 24.14 × 8 =
  25. 25.37 × 8 =
  26. 26.41 × 4 =
  27. 27.49 × 4 =
  28. 28.13 × 8 =
  29. 29.21 × 8 =
  30. 30.39 × 8 =
  31. 31.73 × 4 =
  32. 32.33 × 8 =
  33. 33.36 × 4 =
  34. 34.14 × 4 =
  35. 35.45 × 4 =
  36. 36.35 × 4 =
  37. 37.55 × 4 =
  38. 38.29 × 8 =
  39. 39.27 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 320
  2. 264
  3. 288
  4. 256
  5. 208
  6. 296
  7. 272
  8. 96
  9. 236
  10. 120
  11. 136
  12. 260
  13. 152
  14. 176
  15. 60
  16. 144
  17. 240
  18. 224
  19. 248
  20. 148
  21. 68
  22. 116
  23. 128
  24. 112
  25. 296
  26. 164
  27. 196
  28. 104
  29. 168
  30. 312
  31. 292
  32. 264
  33. 144
  34. 56
  35. 180
  36. 140
  37. 220
  38. 232
  39. 216
  40. 192

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