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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 161 · 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. 1.54 × 4 =
  2. 2.67 × 4 =
  3. 3.22 × 8 =
  4. 4.40 × 8 =
  5. 5.12 × 8 =
  6. 6.38 × 4 =
  7. 7.13 × 8 =
  8. 8.47 × 4 =
  9. 9.31 × 8 =
  10. 10.40 × 4 =
  11. 11.16 × 8 =
  12. 12.33 × 8 =
  13. 13.22 × 4 =
  14. 14.25 × 8 =
  15. 15.58 × 4 =
  16. 16.12 × 4 =
  17. 17.14 × 4 =
  18. 18.39 × 8 =
  19. 19.48 × 4 =
  20. 20.63 × 4 =
  21. 21.17 × 8 =
  22. 22.30 × 4 =
  23. 23.49 × 4 =
  24. 24.13 × 4 =
  25. 25.16 × 4 =
  26. 26.27 × 4 =
  27. 27.18 × 4 =
  28. 28.27 × 8 =
  29. 29.24 × 4 =
  30. 30.24 × 8 =
  31. 31.75 × 4 =
  32. 32.32 × 4 =
  33. 33.36 × 8 =
  34. 34.53 × 4 =
  35. 35.57 × 4 =
  36. 36.44 × 4 =
  37. 37.23 × 8 =
  38. 38.69 × 4 =
  39. 39.23 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 216
  2. 268
  3. 176
  4. 320
  5. 96
  6. 152
  7. 104
  8. 188
  9. 248
  10. 160
  11. 128
  12. 264
  13. 88
  14. 200
  15. 232
  16. 48
  17. 56
  18. 312
  19. 192
  20. 252
  21. 136
  22. 120
  23. 196
  24. 52
  25. 64
  26. 108
  27. 72
  28. 216
  29. 96
  30. 192
  31. 300
  32. 128
  33. 288
  34. 212
  35. 228
  36. 176
  37. 184
  38. 276
  39. 92
  40. 100

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