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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 508 · 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. 2.26 × 4 =
  3. 3.59 × 4 =
  4. 4.35 × 4 =
  5. 5.18 × 8 =
  6. 6.39 × 4 =
  7. 7.37 × 8 =
  8. 8.60 × 4 =
  9. 9.45 × 4 =
  10. 10.44 × 4 =
  11. 11.21 × 4 =
  12. 12.69 × 4 =
  13. 13.29 × 4 =
  14. 14.17 × 8 =
  15. 15.36 × 8 =
  16. 16.14 × 8 =
  17. 17.75 × 4 =
  18. 18.22 × 8 =
  19. 19.65 × 4 =
  20. 20.29 × 8 =
  21. 21.15 × 8 =
  22. 22.33 × 8 =
  23. 23.63 × 4 =
  24. 24.20 × 8 =
  25. 25.16 × 8 =
  26. 26.26 × 8 =
  27. 27.27 × 8 =
  28. 28.19 × 8 =
  29. 29.13 × 8 =
  30. 30.70 × 4 =
  31. 31.34 × 4 =
  32. 32.33 × 4 =
  33. 33.62 × 4 =
  34. 34.28 × 8 =
  35. 35.36 × 4 =
  36. 36.43 × 4 =
  37. 37.39 × 8 =
  38. 38.52 × 4 =
  39. 39.38 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 88
  2. 104
  3. 236
  4. 140
  5. 144
  6. 156
  7. 296
  8. 240
  9. 180
  10. 176
  11. 84
  12. 276
  13. 116
  14. 136
  15. 288
  16. 112
  17. 300
  18. 176
  19. 260
  20. 232
  21. 120
  22. 264
  23. 252
  24. 160
  25. 128
  26. 208
  27. 216
  28. 152
  29. 104
  30. 280
  31. 136
  32. 132
  33. 248
  34. 224
  35. 144
  36. 172
  37. 312
  38. 208
  39. 304
  40. 284

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