= 13× 10

= 130

3.6÷ 1.2+0.5×2.5

=3+ 1.25

=4.25

24.6÷[(2.4+ 1.7)×2]

=24.6÷[4. 1×2]

=24.6÷8.2

=3

3. 15×(0.2 1÷0.35×3.7)

=3. 15×(0.6×3.7)

=3. 15×2.22

=6.993

5×[(3. 1+6.026)÷5.07]

=5×[9. 126÷5.07]

=5× 1.8

=9

[5.32+ 1.68÷(20- 17.6)]×5

=[5.32+ 1.68÷2.4]×5

=[5.32+0.7]×5

=6.02×5

=30. 1

9.52÷ 1.7+43.5÷ 1.5

=5.6+29

=34.6