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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 685 · 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. 1.17 × 8 =
  2. 2.31 × 8 =
  3. 3.24 × 4 =
  4. 4.71 × 4 =
  5. 5.14 × 8 =
  6. 6.20 × 8 =
  7. 7.38 × 4 =
  8. 8.19 × 4 =
  9. 9.34 × 8 =
  10. 10.69 × 4 =
  11. 11.44 × 4 =
  12. 12.23 × 8 =
  13. 13.16 × 8 =
  14. 14.15 × 8 =
  15. 15.19 × 8 =
  16. 16.36 × 8 =
  17. 17.27 × 8 =
  18. 18.56 × 4 =
  19. 19.18 × 8 =
  20. 20.38 × 8 =
  21. 21.62 × 4 =
  22. 22.28 × 8 =
  23. 23.16 × 4 =
  24. 24.57 × 4 =
  25. 25.26 × 8 =
  26. 26.23 × 4 =
  27. 27.30 × 8 =
  28. 28.39 × 4 =
  29. 29.49 × 4 =
  30. 30.29 × 4 =
  31. 31.63 × 4 =
  32. 32.43 × 4 =
  33. 33.64 × 4 =
  34. 34.22 × 4 =
  35. 35.55 × 4 =
  36. 36.26 × 4 =
  37. 37.66 × 4 =
  38. 38.37 × 8 =
  39. 39.12 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 136
  2. 248
  3. 96
  4. 284
  5. 112
  6. 160
  7. 152
  8. 76
  9. 272
  10. 276
  11. 176
  12. 184
  13. 128
  14. 120
  15. 152
  16. 288
  17. 216
  18. 224
  19. 144
  20. 304
  21. 248
  22. 224
  23. 64
  24. 228
  25. 208
  26. 92
  27. 240
  28. 156
  29. 196
  30. 116
  31. 252
  32. 172
  33. 256
  34. 88
  35. 220
  36. 104
  37. 264
  38. 296
  39. 48
  40. 180

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