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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 555 · 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. 1.58 × 4 =
  2. 2.31 × 8 =
  3. 3.24 × 8 =
  4. 4.63 × 4 =
  5. 5.36 × 8 =
  6. 6.35 × 8 =
  7. 7.52 × 4 =
  8. 8.12 × 8 =
  9. 9.44 × 4 =
  10. 10.53 × 4 =
  11. 11.38 × 4 =
  12. 12.61 × 4 =
  13. 13.20 × 8 =
  14. 14.26 × 8 =
  15. 15.62 × 4 =
  16. 16.16 × 8 =
  17. 17.65 × 4 =
  18. 18.39 × 8 =
  19. 19.27 × 8 =
  20. 20.28 × 4 =
  21. 21.17 × 8 =
  22. 22.40 × 4 =
  23. 23.71 × 4 =
  24. 24.45 × 4 =
  25. 25.69 × 4 =
  26. 26.74 × 4 =
  27. 27.29 × 8 =
  28. 28.19 × 4 =
  29. 29.21 × 4 =
  30. 30.37 × 8 =
  31. 31.18 × 4 =
  32. 32.15 × 4 =
  33. 33.14 × 8 =
  34. 34.40 × 8 =
  35. 35.16 × 4 =
  36. 36.19 × 8 =
  37. 37.57 × 4 =
  38. 38.54 × 4 =
  39. 39.75 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 232
  2. 248
  3. 192
  4. 252
  5. 288
  6. 280
  7. 208
  8. 96
  9. 176
  10. 212
  11. 152
  12. 244
  13. 160
  14. 208
  15. 248
  16. 128
  17. 260
  18. 312
  19. 216
  20. 112
  21. 136
  22. 160
  23. 284
  24. 180
  25. 276
  26. 296
  27. 232
  28. 76
  29. 84
  30. 296
  31. 72
  32. 60
  33. 112
  34. 320
  35. 64
  36. 152
  37. 228
  38. 216
  39. 300
  40. 272

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