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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 338 · 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. 1.65 × 4 =
  2. 2.32 × 4 =
  3. 3.31 × 8 =
  4. 4.72 × 4 =
  5. 5.71 × 4 =
  6. 6.48 × 4 =
  7. 7.23 × 8 =
  8. 8.19 × 4 =
  9. 9.32 × 8 =
  10. 10.14 × 4 =
  11. 11.18 × 8 =
  12. 12.20 × 8 =
  13. 13.21 × 4 =
  14. 14.18 × 4 =
  15. 15.27 × 8 =
  16. 16.57 × 4 =
  17. 17.45 × 4 =
  18. 18.24 × 8 =
  19. 19.53 × 4 =
  20. 20.12 × 8 =
  21. 21.61 × 4 =
  22. 22.29 × 4 =
  23. 23.25 × 4 =
  24. 24.23 × 4 =
  25. 25.39 × 4 =
  26. 26.38 × 4 =
  27. 27.42 × 4 =
  28. 28.13 × 8 =
  29. 29.29 × 8 =
  30. 30.36 × 8 =
  31. 31.75 × 4 =
  32. 32.33 × 8 =
  33. 33.21 × 8 =
  34. 34.41 × 4 =
  35. 35.59 × 4 =
  36. 36.38 × 8 =
  37. 37.54 × 4 =
  38. 38.34 × 8 =
  39. 39.44 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 260
  2. 128
  3. 248
  4. 288
  5. 284
  6. 192
  7. 184
  8. 76
  9. 256
  10. 56
  11. 144
  12. 160
  13. 84
  14. 72
  15. 216
  16. 228
  17. 180
  18. 192
  19. 212
  20. 96
  21. 244
  22. 116
  23. 100
  24. 92
  25. 156
  26. 152
  27. 168
  28. 104
  29. 232
  30. 288
  31. 300
  32. 264
  33. 168
  34. 164
  35. 236
  36. 304
  37. 216
  38. 272
  39. 176
  40. 184

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