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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 647 · 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. 1.26 × 8 =
  2. 2.29 × 8 =
  3. 3.20 × 8 =
  4. 4.14 × 8 =
  5. 5.18 × 8 =
  6. 6.17 × 4 =
  7. 7.36 × 4 =
  8. 8.31 × 8 =
  9. 9.54 × 4 =
  10. 10.23 × 8 =
  11. 11.29 × 4 =
  12. 12.19 × 4 =
  13. 13.41 × 4 =
  14. 14.21 × 8 =
  15. 15.38 × 4 =
  16. 16.38 × 8 =
  17. 17.36 × 8 =
  18. 18.60 × 4 =
  19. 19.53 × 4 =
  20. 20.34 × 8 =
  21. 21.37 × 4 =
  22. 22.15 × 8 =
  23. 23.33 × 8 =
  24. 24.65 × 4 =
  25. 25.16 × 8 =
  26. 26.20 × 4 =
  27. 27.42 × 4 =
  28. 28.22 × 8 =
  29. 29.67 × 4 =
  30. 30.23 × 4 =
  31. 31.25 × 8 =
  32. 32.30 × 8 =
  33. 33.21 × 4 =
  34. 34.19 × 8 =
  35. 35.35 × 8 =
  36. 36.15 × 4 =
  37. 37.45 × 4 =
  38. 38.24 × 4 =
  39. 39.24 × 8 =
  40. 40.52 × 4 =

Answer key

  1. 208
  2. 232
  3. 160
  4. 112
  5. 144
  6. 68
  7. 144
  8. 248
  9. 216
  10. 184
  11. 116
  12. 76
  13. 164
  14. 168
  15. 152
  16. 304
  17. 288
  18. 240
  19. 212
  20. 272
  21. 148
  22. 120
  23. 264
  24. 260
  25. 128
  26. 80
  27. 168
  28. 176
  29. 268
  30. 92
  31. 200
  32. 240
  33. 84
  34. 152
  35. 280
  36. 60
  37. 180
  38. 96
  39. 192
  40. 208

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