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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 545 · 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. 1.36 × 8 =
  2. 2.28 × 8 =
  3. 3.22 × 8 =
  4. 4.50 × 4 =
  5. 5.31 × 4 =
  6. 6.45 × 4 =
  7. 7.41 × 4 =
  8. 8.47 × 4 =
  9. 9.35 × 8 =
  10. 10.33 × 8 =
  11. 11.17 × 4 =
  12. 12.37 × 8 =
  13. 13.20 × 8 =
  14. 14.30 × 4 =
  15. 15.24 × 8 =
  16. 16.27 × 8 =
  17. 17.15 × 8 =
  18. 18.21 × 4 =
  19. 19.18 × 4 =
  20. 20.29 × 8 =
  21. 21.14 × 4 =
  22. 22.63 × 4 =
  23. 23.48 × 4 =
  24. 24.74 × 4 =
  25. 25.55 × 4 =
  26. 26.39 × 8 =
  27. 27.44 × 4 =
  28. 28.13 × 8 =
  29. 29.26 × 8 =
  30. 30.67 × 4 =
  31. 31.12 × 8 =
  32. 32.73 × 4 =
  33. 33.16 × 8 =
  34. 34.75 × 4 =
  35. 35.26 × 4 =
  36. 36.34 × 8 =
  37. 37.53 × 4 =
  38. 38.17 × 8 =
  39. 39.40 × 8 =
  40. 40.72 × 4 =

Answer key

  1. 288
  2. 224
  3. 176
  4. 200
  5. 124
  6. 180
  7. 164
  8. 188
  9. 280
  10. 264
  11. 68
  12. 296
  13. 160
  14. 120
  15. 192
  16. 216
  17. 120
  18. 84
  19. 72
  20. 232
  21. 56
  22. 252
  23. 192
  24. 296
  25. 220
  26. 312
  27. 176
  28. 104
  29. 208
  30. 268
  31. 96
  32. 292
  33. 128
  34. 300
  35. 104
  36. 272
  37. 212
  38. 136
  39. 320
  40. 288

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