4.85÷

5

18

-3.6+6.15×3

3

5

=4.85×

18

5

-3.6+6.15×3.6，
=4.85×3.6-3.6+6.15×3.6，
=（4.85+6.15-1）×3.6，
=10×3.6，
=36．