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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 399 · 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. 1.56 × 4 =
  2. 2.19 × 8 =
  3. 3.12 × 4 =
  4. 4.69 × 4 =
  5. 5.15 × 8 =
  6. 6.40 × 8 =
  7. 7.72 × 4 =
  8. 8.29 × 4 =
  9. 9.71 × 4 =
  10. 10.20 × 4 =
  11. 11.37 × 4 =
  12. 12.23 × 8 =
  13. 13.63 × 4 =
  14. 14.17 × 4 =
  15. 15.24 × 8 =
  16. 16.16 × 8 =
  17. 17.12 × 8 =
  18. 18.66 × 4 =
  19. 19.14 × 4 =
  20. 20.34 × 8 =
  21. 21.61 × 4 =
  22. 22.34 × 4 =
  23. 23.32 × 8 =
  24. 24.20 × 8 =
  25. 25.45 × 4 =
  26. 26.13 × 4 =
  27. 27.17 × 8 =
  28. 28.27 × 4 =
  29. 29.26 × 8 =
  30. 30.35 × 8 =
  31. 31.37 × 8 =
  32. 32.22 × 4 =
  33. 33.25 × 8 =
  34. 34.31 × 8 =
  35. 35.47 × 4 =
  36. 36.16 × 4 =
  37. 37.22 × 8 =
  38. 38.39 × 8 =
  39. 39.23 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 224
  2. 152
  3. 48
  4. 276
  5. 120
  6. 320
  7. 288
  8. 116
  9. 284
  10. 80
  11. 148
  12. 184
  13. 252
  14. 68
  15. 192
  16. 128
  17. 96
  18. 264
  19. 56
  20. 272
  21. 244
  22. 136
  23. 256
  24. 160
  25. 180
  26. 52
  27. 136
  28. 108
  29. 208
  30. 280
  31. 296
  32. 88
  33. 200
  34. 248
  35. 188
  36. 64
  37. 176
  38. 312
  39. 92
  40. 128

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