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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 774 · 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. 1.22 × 8 =
  2. 2.38 × 8 =
  3. 3.13 × 8 =
  4. 4.15 × 8 =
  5. 5.16 × 8 =
  6. 6.15 × 4 =
  7. 7.68 × 4 =
  8. 8.12 × 4 =
  9. 9.53 × 4 =
  10. 10.41 × 4 =
  11. 11.74 × 4 =
  12. 12.21 × 8 =
  13. 13.63 × 4 =
  14. 14.29 × 4 =
  15. 15.37 × 8 =
  16. 16.28 × 8 =
  17. 17.18 × 4 =
  18. 18.44 × 4 =
  19. 19.54 × 4 =
  20. 20.62 × 4 =
  21. 21.58 × 4 =
  22. 22.30 × 4 =
  23. 23.61 × 4 =
  24. 24.12 × 8 =
  25. 25.59 × 4 =
  26. 26.26 × 8 =
  27. 27.35 × 8 =
  28. 28.31 × 4 =
  29. 29.25 × 4 =
  30. 30.34 × 4 =
  31. 31.72 × 4 =
  32. 32.39 × 4 =
  33. 33.17 × 8 =
  34. 34.30 × 8 =
  35. 35.46 × 4 =
  36. 36.65 × 4 =
  37. 37.27 × 4 =
  38. 38.23 × 4 =
  39. 39.71 × 4 =
  40. 40.19 × 4 =

Answer key

  1. 176
  2. 304
  3. 104
  4. 120
  5. 128
  6. 60
  7. 272
  8. 48
  9. 212
  10. 164
  11. 296
  12. 168
  13. 252
  14. 116
  15. 296
  16. 224
  17. 72
  18. 176
  19. 216
  20. 248
  21. 232
  22. 120
  23. 244
  24. 96
  25. 236
  26. 208
  27. 280
  28. 124
  29. 100
  30. 136
  31. 288
  32. 156
  33. 136
  34. 240
  35. 184
  36. 260
  37. 108
  38. 92
  39. 284
  40. 76

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