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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 770 · 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. 1.20 × 4 =
  2. 2.16 × 4 =
  3. 3.43 × 4 =
  4. 4.36 × 8 =
  5. 5.61 × 4 =
  6. 6.72 × 4 =
  7. 7.39 × 8 =
  8. 8.34 × 8 =
  9. 9.65 × 4 =
  10. 10.58 × 4 =
  11. 11.18 × 8 =
  12. 12.39 × 4 =
  13. 13.17 × 8 =
  14. 14.33 × 4 =
  15. 15.46 × 4 =
  16. 16.71 × 4 =
  17. 17.41 × 4 =
  18. 18.16 × 8 =
  19. 19.30 × 4 =
  20. 20.15 × 8 =
  21. 21.21 × 8 =
  22. 22.62 × 4 =
  23. 23.26 × 4 =
  24. 24.23 × 8 =
  25. 25.57 × 4 =
  26. 26.30 × 8 =
  27. 27.66 × 4 =
  28. 28.25 × 4 =
  29. 29.15 × 4 =
  30. 30.27 × 8 =
  31. 31.37 × 8 =
  32. 32.22 × 4 =
  33. 33.36 × 4 =
  34. 34.60 × 4 =
  35. 35.56 × 4 =
  36. 36.29 × 8 =
  37. 37.40 × 8 =
  38. 38.22 × 8 =
  39. 39.35 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 80
  2. 64
  3. 172
  4. 288
  5. 244
  6. 288
  7. 312
  8. 272
  9. 260
  10. 232
  11. 144
  12. 156
  13. 136
  14. 132
  15. 184
  16. 284
  17. 164
  18. 128
  19. 120
  20. 120
  21. 168
  22. 248
  23. 104
  24. 184
  25. 228
  26. 240
  27. 264
  28. 100
  29. 60
  30. 216
  31. 296
  32. 88
  33. 144
  34. 240
  35. 224
  36. 232
  37. 320
  38. 176
  39. 280
  40. 296

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