← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 68 · 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. 1.31 × 4 =
  2. 2.65 × 4 =
  3. 3.18 × 8 =
  4. 4.17 × 8 =
  5. 5.59 × 4 =
  6. 6.25 × 8 =
  7. 7.42 × 4 =
  8. 8.60 × 4 =
  9. 9.72 × 4 =
  10. 10.24 × 8 =
  11. 11.50 × 4 =
  12. 12.54 × 4 =
  13. 13.75 × 4 =
  14. 14.20 × 4 =
  15. 15.41 × 4 =
  16. 16.36 × 8 =
  17. 17.21 × 4 =
  18. 18.18 × 4 =
  19. 19.14 × 8 =
  20. 20.38 × 8 =
  21. 21.27 × 8 =
  22. 22.37 × 4 =
  23. 23.31 × 8 =
  24. 24.26 × 4 =
  25. 25.16 × 4 =
  26. 26.47 × 4 =
  27. 27.68 × 4 =
  28. 28.30 × 4 =
  29. 29.29 × 4 =
  30. 30.67 × 4 =
  31. 31.44 × 4 =
  32. 32.34 × 8 =
  33. 33.32 × 8 =
  34. 34.17 × 4 =
  35. 35.19 × 8 =
  36. 36.16 × 8 =
  37. 37.21 × 8 =
  38. 38.62 × 4 =
  39. 39.63 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 124
  2. 260
  3. 144
  4. 136
  5. 236
  6. 200
  7. 168
  8. 240
  9. 288
  10. 192
  11. 200
  12. 216
  13. 300
  14. 80
  15. 164
  16. 288
  17. 84
  18. 72
  19. 112
  20. 304
  21. 216
  22. 148
  23. 248
  24. 104
  25. 64
  26. 188
  27. 272
  28. 120
  29. 116
  30. 268
  31. 176
  32. 272
  33. 256
  34. 68
  35. 152
  36. 128
  37. 168
  38. 248
  39. 252
  40. 96

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths