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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 560 · 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. 1.33 × 8 =
  2. 2.23 × 8 =
  3. 3.21 × 8 =
  4. 4.25 × 8 =
  5. 5.36 × 8 =
  6. 6.59 × 4 =
  7. 7.38 × 8 =
  8. 8.28 × 8 =
  9. 9.30 × 4 =
  10. 10.16 × 8 =
  11. 11.19 × 4 =
  12. 12.31 × 8 =
  13. 13.47 × 4 =
  14. 14.20 × 4 =
  15. 15.35 × 8 =
  16. 16.70 × 4 =
  17. 17.68 × 4 =
  18. 18.72 × 4 =
  19. 19.46 × 4 =
  20. 20.41 × 4 =
  21. 21.15 × 4 =
  22. 22.22 × 4 =
  23. 23.53 × 4 =
  24. 24.24 × 8 =
  25. 25.27 × 4 =
  26. 26.48 × 4 =
  27. 27.45 × 4 =
  28. 28.29 × 8 =
  29. 29.14 × 4 =
  30. 30.29 × 4 =
  31. 31.44 × 4 =
  32. 32.52 × 4 =
  33. 33.19 × 8 =
  34. 34.36 × 4 =
  35. 35.42 × 4 =
  36. 36.17 × 4 =
  37. 37.54 × 4 =
  38. 38.49 × 4 =
  39. 39.34 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 264
  2. 184
  3. 168
  4. 200
  5. 288
  6. 236
  7. 304
  8. 224
  9. 120
  10. 128
  11. 76
  12. 248
  13. 188
  14. 80
  15. 280
  16. 280
  17. 272
  18. 288
  19. 184
  20. 164
  21. 60
  22. 88
  23. 212
  24. 192
  25. 108
  26. 192
  27. 180
  28. 232
  29. 56
  30. 116
  31. 176
  32. 208
  33. 152
  34. 144
  35. 168
  36. 68
  37. 216
  38. 196
  39. 136
  40. 96

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