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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 51 · 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. 1.21 × 4 =
  2. 2.44 × 4 =
  3. 3.20 × 4 =
  4. 4.68 × 4 =
  5. 5.53 × 4 =
  6. 6.26 × 8 =
  7. 7.29 × 8 =
  8. 8.15 × 8 =
  9. 9.27 × 4 =
  10. 10.71 × 4 =
  11. 11.20 × 8 =
  12. 12.36 × 8 =
  13. 13.31 × 4 =
  14. 14.74 × 4 =
  15. 15.12 × 8 =
  16. 16.34 × 8 =
  17. 17.55 × 4 =
  18. 18.41 × 4 =
  19. 19.35 × 4 =
  20. 20.45 × 4 =
  21. 21.32 × 4 =
  22. 22.48 × 4 =
  23. 23.25 × 4 =
  24. 24.63 × 4 =
  25. 25.25 × 8 =
  26. 26.47 × 4 =
  27. 27.70 × 4 =
  28. 28.13 × 8 =
  29. 29.61 × 4 =
  30. 30.21 × 8 =
  31. 31.43 × 4 =
  32. 32.18 × 8 =
  33. 33.15 × 4 =
  34. 34.38 × 4 =
  35. 35.65 × 4 =
  36. 36.39 × 8 =
  37. 37.27 × 8 =
  38. 38.67 × 4 =
  39. 39.16 × 8 =
  40. 40.52 × 4 =

Answer key

  1. 84
  2. 176
  3. 80
  4. 272
  5. 212
  6. 208
  7. 232
  8. 120
  9. 108
  10. 284
  11. 160
  12. 288
  13. 124
  14. 296
  15. 96
  16. 272
  17. 220
  18. 164
  19. 140
  20. 180
  21. 128
  22. 192
  23. 100
  24. 252
  25. 200
  26. 188
  27. 280
  28. 104
  29. 244
  30. 168
  31. 172
  32. 144
  33. 60
  34. 152
  35. 260
  36. 312
  37. 216
  38. 268
  39. 128
  40. 208

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