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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 491 · 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. 1.66 × 4 =
  2. 2.25 × 8 =
  3. 3.33 × 8 =
  4. 4.45 × 4 =
  5. 5.40 × 4 =
  6. 6.19 × 8 =
  7. 7.28 × 8 =
  8. 8.24 × 8 =
  9. 9.32 × 4 =
  10. 10.20 × 4 =
  11. 11.27 × 8 =
  12. 12.32 × 8 =
  13. 13.29 × 8 =
  14. 14.36 × 8 =
  15. 15.23 × 8 =
  16. 16.26 × 8 =
  17. 17.34 × 4 =
  18. 18.20 × 8 =
  19. 19.30 × 8 =
  20. 20.19 × 4 =
  21. 21.68 × 4 =
  22. 22.34 × 8 =
  23. 23.56 × 4 =
  24. 24.43 × 4 =
  25. 25.13 × 4 =
  26. 26.33 × 4 =
  27. 27.64 × 4 =
  28. 28.67 × 4 =
  29. 29.16 × 4 =
  30. 30.50 × 4 =
  31. 31.18 × 8 =
  32. 32.55 × 4 =
  33. 33.37 × 4 =
  34. 34.22 × 8 =
  35. 35.14 × 4 =
  36. 36.44 × 4 =
  37. 37.15 × 8 =
  38. 38.31 × 8 =
  39. 39.70 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 264
  2. 200
  3. 264
  4. 180
  5. 160
  6. 152
  7. 224
  8. 192
  9. 128
  10. 80
  11. 216
  12. 256
  13. 232
  14. 288
  15. 184
  16. 208
  17. 136
  18. 160
  19. 240
  20. 76
  21. 272
  22. 272
  23. 224
  24. 172
  25. 52
  26. 132
  27. 256
  28. 268
  29. 64
  30. 200
  31. 144
  32. 220
  33. 148
  34. 176
  35. 56
  36. 176
  37. 120
  38. 248
  39. 280
  40. 288

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