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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 350 · 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. 1.41 × 4 =
  2. 2.31 × 4 =
  3. 3.29 × 8 =
  4. 4.32 × 8 =
  5. 5.18 × 8 =
  6. 6.30 × 4 =
  7. 7.40 × 4 =
  8. 8.73 × 4 =
  9. 9.60 × 4 =
  10. 10.57 × 4 =
  11. 11.66 × 4 =
  12. 12.23 × 4 =
  13. 13.71 × 4 =
  14. 14.53 × 4 =
  15. 15.38 × 8 =
  16. 16.17 × 8 =
  17. 17.39 × 8 =
  18. 18.48 × 4 =
  19. 19.23 × 8 =
  20. 20.21 × 4 =
  21. 21.16 × 4 =
  22. 22.33 × 8 =
  23. 23.50 × 4 =
  24. 24.31 × 8 =
  25. 25.18 × 4 =
  26. 26.35 × 4 =
  27. 27.20 × 4 =
  28. 28.30 × 8 =
  29. 29.21 × 8 =
  30. 30.35 × 8 =
  31. 31.26 × 8 =
  32. 32.34 × 8 =
  33. 33.43 × 4 =
  34. 34.28 × 8 =
  35. 35.74 × 4 =
  36. 36.37 × 4 =
  37. 37.40 × 8 =
  38. 38.65 × 4 =
  39. 39.33 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 164
  2. 124
  3. 232
  4. 256
  5. 144
  6. 120
  7. 160
  8. 292
  9. 240
  10. 228
  11. 264
  12. 92
  13. 284
  14. 212
  15. 304
  16. 136
  17. 312
  18. 192
  19. 184
  20. 84
  21. 64
  22. 264
  23. 200
  24. 248
  25. 72
  26. 140
  27. 80
  28. 240
  29. 168
  30. 280
  31. 208
  32. 272
  33. 172
  34. 224
  35. 296
  36. 148
  37. 320
  38. 260
  39. 132
  40. 112

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