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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 128 · 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. 1.22 × 4 =
  2. 2.54 × 4 =
  3. 3.31 × 4 =
  4. 4.40 × 8 =
  5. 5.45 × 4 =
  6. 6.19 × 8 =
  7. 7.39 × 8 =
  8. 8.18 × 8 =
  9. 9.69 × 4 =
  10. 10.57 × 4 =
  11. 11.13 × 8 =
  12. 12.29 × 8 =
  13. 13.35 × 8 =
  14. 14.41 × 4 =
  15. 15.23 × 4 =
  16. 16.32 × 8 =
  17. 17.55 × 4 =
  18. 18.26 × 8 =
  19. 19.22 × 8 =
  20. 20.27 × 4 =
  21. 21.34 × 8 =
  22. 22.16 × 4 =
  23. 23.21 × 8 =
  24. 24.44 × 4 =
  25. 25.75 × 4 =
  26. 26.29 × 4 =
  27. 27.31 × 8 =
  28. 28.12 × 8 =
  29. 29.71 × 4 =
  30. 30.42 × 4 =
  31. 31.30 × 8 =
  32. 32.24 × 4 =
  33. 33.63 × 4 =
  34. 34.23 × 8 =
  35. 35.48 × 4 =
  36. 36.30 × 4 =
  37. 37.18 × 4 =
  38. 38.36 × 8 =
  39. 39.61 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 88
  2. 216
  3. 124
  4. 320
  5. 180
  6. 152
  7. 312
  8. 144
  9. 276
  10. 228
  11. 104
  12. 232
  13. 280
  14. 164
  15. 92
  16. 256
  17. 220
  18. 208
  19. 176
  20. 108
  21. 272
  22. 64
  23. 168
  24. 176
  25. 300
  26. 116
  27. 248
  28. 96
  29. 284
  30. 168
  31. 240
  32. 96
  33. 252
  34. 184
  35. 192
  36. 120
  37. 72
  38. 288
  39. 244
  40. 112

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