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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 171 · 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. 1.52 × 4 =
  2. 2.26 × 8 =
  3. 3.37 × 8 =
  4. 4.13 × 4 =
  5. 5.38 × 4 =
  6. 6.49 × 4 =
  7. 7.62 × 4 =
  8. 8.39 × 4 =
  9. 9.35 × 4 =
  10. 10.16 × 4 =
  11. 11.55 × 4 =
  12. 12.19 × 8 =
  13. 13.19 × 4 =
  14. 14.38 × 8 =
  15. 15.16 × 8 =
  16. 16.60 × 4 =
  17. 17.43 × 4 =
  18. 18.12 × 4 =
  19. 19.31 × 4 =
  20. 20.29 × 8 =
  21. 21.12 × 8 =
  22. 22.63 × 4 =
  23. 23.35 × 8 =
  24. 24.30 × 4 =
  25. 25.14 × 4 =
  26. 26.22 × 8 =
  27. 27.57 × 4 =
  28. 28.33 × 8 =
  29. 29.59 × 4 =
  30. 30.13 × 8 =
  31. 31.23 × 8 =
  32. 32.18 × 4 =
  33. 33.54 × 4 =
  34. 34.75 × 4 =
  35. 35.27 × 8 =
  36. 36.58 × 4 =
  37. 37.42 × 4 =
  38. 38.40 × 4 =
  39. 39.40 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 208
  2. 208
  3. 296
  4. 52
  5. 152
  6. 196
  7. 248
  8. 156
  9. 140
  10. 64
  11. 220
  12. 152
  13. 76
  14. 304
  15. 128
  16. 240
  17. 172
  18. 48
  19. 124
  20. 232
  21. 96
  22. 252
  23. 280
  24. 120
  25. 56
  26. 176
  27. 228
  28. 264
  29. 236
  30. 104
  31. 184
  32. 72
  33. 216
  34. 300
  35. 216
  36. 232
  37. 168
  38. 160
  39. 320
  40. 60

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