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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 426 · 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. 1.12 × 8 =
  2. 2.14 × 8 =
  3. 3.46 × 4 =
  4. 4.62 × 4 =
  5. 5.20 × 8 =
  6. 6.13 × 4 =
  7. 7.23 × 8 =
  8. 8.27 × 8 =
  9. 9.31 × 4 =
  10. 10.37 × 8 =
  11. 11.29 × 8 =
  12. 12.38 × 8 =
  13. 13.30 × 8 =
  14. 14.57 × 4 =
  15. 15.29 × 4 =
  16. 16.32 × 4 =
  17. 17.64 × 4 =
  18. 18.35 × 4 =
  19. 19.67 × 4 =
  20. 20.16 × 4 =
  21. 21.21 × 8 =
  22. 22.42 × 4 =
  23. 23.34 × 4 =
  24. 24.20 × 4 =
  25. 25.71 × 4 =
  26. 26.50 × 4 =
  27. 27.65 × 4 =
  28. 28.38 × 4 =
  29. 29.61 × 4 =
  30. 30.49 × 4 =
  31. 31.18 × 8 =
  32. 32.66 × 4 =
  33. 33.54 × 4 =
  34. 34.13 × 8 =
  35. 35.33 × 8 =
  36. 36.25 × 4 =
  37. 37.18 × 4 =
  38. 38.75 × 4 =
  39. 39.72 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 96
  2. 112
  3. 184
  4. 248
  5. 160
  6. 52
  7. 184
  8. 216
  9. 124
  10. 296
  11. 232
  12. 304
  13. 240
  14. 228
  15. 116
  16. 128
  17. 256
  18. 140
  19. 268
  20. 64
  21. 168
  22. 168
  23. 136
  24. 80
  25. 284
  26. 200
  27. 260
  28. 152
  29. 244
  30. 196
  31. 144
  32. 264
  33. 216
  34. 104
  35. 264
  36. 100
  37. 72
  38. 300
  39. 288
  40. 224

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