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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 593 · 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. 1.69 × 4 =
  2. 2.34 × 4 =
  3. 3.59 × 4 =
  4. 4.52 × 4 =
  5. 5.15 × 8 =
  6. 6.14 × 8 =
  7. 7.34 × 8 =
  8. 8.25 × 8 =
  9. 9.20 × 8 =
  10. 10.43 × 4 =
  11. 11.44 × 4 =
  12. 12.72 × 4 =
  13. 13.38 × 8 =
  14. 14.17 × 4 =
  15. 15.19 × 4 =
  16. 16.18 × 8 =
  17. 17.32 × 4 =
  18. 18.27 × 4 =
  19. 19.39 × 8 =
  20. 20.13 × 8 =
  21. 21.13 × 4 =
  22. 22.36 × 8 =
  23. 23.26 × 4 =
  24. 24.70 × 4 =
  25. 25.21 × 8 =
  26. 26.28 × 8 =
  27. 27.35 × 8 =
  28. 28.27 × 8 =
  29. 29.29 × 8 =
  30. 30.37 × 4 =
  31. 31.12 × 8 =
  32. 32.58 × 4 =
  33. 33.33 × 8 =
  34. 34.60 × 4 =
  35. 35.65 × 4 =
  36. 36.20 × 4 =
  37. 37.54 × 4 =
  38. 38.19 × 8 =
  39. 39.62 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 276
  2. 136
  3. 236
  4. 208
  5. 120
  6. 112
  7. 272
  8. 200
  9. 160
  10. 172
  11. 176
  12. 288
  13. 304
  14. 68
  15. 76
  16. 144
  17. 128
  18. 108
  19. 312
  20. 104
  21. 52
  22. 288
  23. 104
  24. 280
  25. 168
  26. 224
  27. 280
  28. 216
  29. 232
  30. 148
  31. 96
  32. 232
  33. 264
  34. 240
  35. 260
  36. 80
  37. 216
  38. 152
  39. 248
  40. 176

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