13.2-(3.7+6.3)=13.2-10=3.210.26-4.26-3.78=6-3.78=2.22(100+1)*7.8=100*7.8+7.8=7800+7.8=7807.8请帮我完成采纳任务!
=13.2—(3.7+6.3)=13.2—10=3.2