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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 455 · 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. 1.23 × 8 =
  2. 2.30 × 8 =
  3. 3.13 × 8 =
  4. 4.69 × 4 =
  5. 5.53 × 4 =
  6. 6.33 × 4 =
  7. 7.40 × 8 =
  8. 8.24 × 8 =
  9. 9.46 × 4 =
  10. 10.12 × 8 =
  11. 11.44 × 4 =
  12. 12.68 × 4 =
  13. 13.33 × 8 =
  14. 14.73 × 4 =
  15. 15.26 × 8 =
  16. 16.15 × 8 =
  17. 17.56 × 4 =
  18. 18.30 × 4 =
  19. 19.31 × 8 =
  20. 20.29 × 8 =
  21. 21.19 × 8 =
  22. 22.27 × 4 =
  23. 23.57 × 4 =
  24. 24.26 × 4 =
  25. 25.32 × 8 =
  26. 26.18 × 8 =
  27. 27.21 × 8 =
  28. 28.25 × 8 =
  29. 29.36 × 8 =
  30. 30.55 × 4 =
  31. 31.43 × 4 =
  32. 32.31 × 4 =
  33. 33.16 × 8 =
  34. 34.28 × 4 =
  35. 35.22 × 8 =
  36. 36.38 × 4 =
  37. 37.37 × 4 =
  38. 38.41 × 4 =
  39. 39.12 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 184
  2. 240
  3. 104
  4. 276
  5. 212
  6. 132
  7. 320
  8. 192
  9. 184
  10. 96
  11. 176
  12. 272
  13. 264
  14. 292
  15. 208
  16. 120
  17. 224
  18. 120
  19. 248
  20. 232
  21. 152
  22. 108
  23. 228
  24. 104
  25. 256
  26. 144
  27. 168
  28. 200
  29. 288
  30. 220
  31. 172
  32. 124
  33. 128
  34. 112
  35. 176
  36. 152
  37. 148
  38. 164
  39. 48
  40. 232

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