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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 121 · 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. 1.35 × 4 =
  2. 2.44 × 4 =
  3. 3.25 × 8 =
  4. 4.26 × 8 =
  5. 5.39 × 8 =
  6. 6.34 × 8 =
  7. 7.62 × 4 =
  8. 8.51 × 4 =
  9. 9.36 × 8 =
  10. 10.36 × 4 =
  11. 11.21 × 8 =
  12. 12.28 × 8 =
  13. 13.54 × 4 =
  14. 14.28 × 4 =
  15. 15.12 × 4 =
  16. 16.13 × 8 =
  17. 17.66 × 4 =
  18. 18.57 × 4 =
  19. 19.47 × 4 =
  20. 20.27 × 4 =
  21. 21.41 × 4 =
  22. 22.37 × 8 =
  23. 23.52 × 4 =
  24. 24.15 × 8 =
  25. 25.16 × 8 =
  26. 26.15 × 4 =
  27. 27.22 × 8 =
  28. 28.33 × 8 =
  29. 29.40 × 8 =
  30. 30.29 × 4 =
  31. 31.23 × 8 =
  32. 32.14 × 8 =
  33. 33.30 × 8 =
  34. 34.27 × 8 =
  35. 35.19 × 8 =
  36. 36.32 × 4 =
  37. 37.37 × 4 =
  38. 38.22 × 4 =
  39. 39.49 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 140
  2. 176
  3. 200
  4. 208
  5. 312
  6. 272
  7. 248
  8. 204
  9. 288
  10. 144
  11. 168
  12. 224
  13. 216
  14. 112
  15. 48
  16. 104
  17. 264
  18. 228
  19. 188
  20. 108
  21. 164
  22. 296
  23. 208
  24. 120
  25. 128
  26. 60
  27. 176
  28. 264
  29. 320
  30. 116
  31. 184
  32. 112
  33. 240
  34. 216
  35. 152
  36. 128
  37. 148
  38. 88
  39. 196
  40. 252

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