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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 271 · 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. 1.29 × 8 =
  2. 2.18 × 4 =
  3. 3.44 × 4 =
  4. 4.33 × 8 =
  5. 5.16 × 4 =
  6. 6.45 × 4 =
  7. 7.13 × 8 =
  8. 8.17 × 8 =
  9. 9.54 × 4 =
  10. 10.72 × 4 =
  11. 11.34 × 8 =
  12. 12.28 × 8 =
  13. 13.39 × 8 =
  14. 14.37 × 4 =
  15. 15.18 × 8 =
  16. 16.37 × 8 =
  17. 17.30 × 8 =
  18. 18.48 × 4 =
  19. 19.19 × 8 =
  20. 20.12 × 8 =
  21. 21.25 × 8 =
  22. 22.19 × 4 =
  23. 23.40 × 8 =
  24. 24.74 × 4 =
  25. 25.36 × 4 =
  26. 26.62 × 4 =
  27. 27.25 × 4 =
  28. 28.33 × 4 =
  29. 29.21 × 4 =
  30. 30.23 × 8 =
  31. 31.14 × 8 =
  32. 32.21 × 8 =
  33. 33.47 × 4 =
  34. 34.65 × 4 =
  35. 35.42 × 4 =
  36. 36.69 × 4 =
  37. 37.24 × 8 =
  38. 38.20 × 8 =
  39. 39.31 × 8 =
  40. 40.61 × 4 =

Answer key

  1. 232
  2. 72
  3. 176
  4. 264
  5. 64
  6. 180
  7. 104
  8. 136
  9. 216
  10. 288
  11. 272
  12. 224
  13. 312
  14. 148
  15. 144
  16. 296
  17. 240
  18. 192
  19. 152
  20. 96
  21. 200
  22. 76
  23. 320
  24. 296
  25. 144
  26. 248
  27. 100
  28. 132
  29. 84
  30. 184
  31. 112
  32. 168
  33. 188
  34. 260
  35. 168
  36. 276
  37. 192
  38. 160
  39. 248
  40. 244

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