17.6-7.6*1.4-5.36
=10+7.6-7.6*1.4-5.36
=10-7.6*（1.4-1）-5.36
=10-7.6*0.4-5.36
=10-3.04-5.36
=10-（3.04+5.36）
=10-8.4
=1.6

3.3*9.9
=3.3*（10-0.1）
=3.3*10-3.3*0.1
=33-0.33
=32.67