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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 214 · 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. 1.37 × 8 =
  2. 2.38 × 8 =
  3. 3.48 × 4 =
  4. 4.29 × 4 =
  5. 5.25 × 4 =
  6. 6.13 × 8 =
  7. 7.23 × 4 =
  8. 8.46 × 4 =
  9. 9.56 × 4 =
  10. 10.17 × 8 =
  11. 11.39 × 4 =
  12. 12.61 × 4 =
  13. 13.21 × 8 =
  14. 14.55 × 4 =
  15. 15.18 × 4 =
  16. 16.26 × 8 =
  17. 17.33 × 8 =
  18. 18.39 × 8 =
  19. 19.36 × 8 =
  20. 20.14 × 8 =
  21. 21.73 × 4 =
  22. 22.64 × 4 =
  23. 23.20 × 4 =
  24. 24.44 × 4 =
  25. 25.70 × 4 =
  26. 26.33 × 4 =
  27. 27.38 × 4 =
  28. 28.13 × 4 =
  29. 29.71 × 4 =
  30. 30.43 × 4 =
  31. 31.29 × 8 =
  32. 32.57 × 4 =
  33. 33.45 × 4 =
  34. 34.23 × 8 =
  35. 35.34 × 8 =
  36. 36.25 × 8 =
  37. 37.14 × 4 =
  38. 38.40 × 4 =
  39. 39.18 × 8 =
  40. 40.30 × 4 =

Answer key

  1. 296
  2. 304
  3. 192
  4. 116
  5. 100
  6. 104
  7. 92
  8. 184
  9. 224
  10. 136
  11. 156
  12. 244
  13. 168
  14. 220
  15. 72
  16. 208
  17. 264
  18. 312
  19. 288
  20. 112
  21. 292
  22. 256
  23. 80
  24. 176
  25. 280
  26. 132
  27. 152
  28. 52
  29. 284
  30. 172
  31. 232
  32. 228
  33. 180
  34. 184
  35. 272
  36. 200
  37. 56
  38. 160
  39. 144
  40. 120

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