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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 336 · 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. 1.19 × 4 =
  2. 2.18 × 8 =
  3. 3.20 × 8 =
  4. 4.29 × 8 =
  5. 5.36 × 4 =
  6. 6.16 × 4 =
  7. 7.40 × 8 =
  8. 8.24 × 4 =
  9. 9.15 × 4 =
  10. 10.23 × 4 =
  11. 11.28 × 8 =
  12. 12.14 × 8 =
  13. 13.28 × 4 =
  14. 14.51 × 4 =
  15. 15.22 × 8 =
  16. 16.16 × 8 =
  17. 17.33 × 4 =
  18. 18.29 × 4 =
  19. 19.34 × 8 =
  20. 20.12 × 4 =
  21. 21.75 × 4 =
  22. 22.67 × 4 =
  23. 23.37 × 4 =
  24. 24.24 × 8 =
  25. 25.21 × 4 =
  26. 26.32 × 4 =
  27. 27.33 × 8 =
  28. 28.60 × 4 =
  29. 29.27 × 4 =
  30. 30.35 × 8 =
  31. 31.58 × 4 =
  32. 32.46 × 4 =
  33. 33.52 × 4 =
  34. 34.38 × 8 =
  35. 35.12 × 8 =
  36. 36.35 × 4 =
  37. 37.49 × 4 =
  38. 38.27 × 8 =
  39. 39.74 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 76
  2. 144
  3. 160
  4. 232
  5. 144
  6. 64
  7. 320
  8. 96
  9. 60
  10. 92
  11. 224
  12. 112
  13. 112
  14. 204
  15. 176
  16. 128
  17. 132
  18. 116
  19. 272
  20. 48
  21. 300
  22. 268
  23. 148
  24. 192
  25. 84
  26. 128
  27. 264
  28. 240
  29. 108
  30. 280
  31. 232
  32. 184
  33. 208
  34. 304
  35. 96
  36. 140
  37. 196
  38. 216
  39. 296
  40. 176

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