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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 333 · 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. 1.18 × 8 =
  2. 2.20 × 4 =
  3. 3.26 × 8 =
  4. 4.19 × 8 =
  5. 5.22 × 8 =
  6. 6.25 × 4 =
  7. 7.40 × 4 =
  8. 8.63 × 4 =
  9. 9.38 × 8 =
  10. 10.26 × 4 =
  11. 11.37 × 4 =
  12. 12.20 × 8 =
  13. 13.56 × 4 =
  14. 14.47 × 4 =
  15. 15.40 × 8 =
  16. 16.67 × 4 =
  17. 17.22 × 4 =
  18. 18.34 × 4 =
  19. 19.23 × 8 =
  20. 20.27 × 8 =
  21. 21.35 × 4 =
  22. 22.25 × 8 =
  23. 23.41 × 4 =
  24. 24.19 × 4 =
  25. 25.14 × 4 =
  26. 26.70 × 4 =
  27. 27.12 × 4 =
  28. 28.34 × 8 =
  29. 29.71 × 4 =
  30. 30.57 × 4 =
  31. 31.69 × 4 =
  32. 32.49 × 4 =
  33. 33.64 × 4 =
  34. 34.14 × 8 =
  35. 35.13 × 8 =
  36. 36.72 × 4 =
  37. 37.27 × 4 =
  38. 38.42 × 4 =
  39. 39.32 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 144
  2. 80
  3. 208
  4. 152
  5. 176
  6. 100
  7. 160
  8. 252
  9. 304
  10. 104
  11. 148
  12. 160
  13. 224
  14. 188
  15. 320
  16. 268
  17. 88
  18. 136
  19. 184
  20. 216
  21. 140
  22. 200
  23. 164
  24. 76
  25. 56
  26. 280
  27. 48
  28. 272
  29. 284
  30. 228
  31. 276
  32. 196
  33. 256
  34. 112
  35. 104
  36. 288
  37. 108
  38. 168
  39. 128
  40. 68

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