判断正误，将错误的改正过来。9T;z8|*h4~9t7o
（1）17.6+29.4×1.6 请选择×√7y/i.w6v(R-I9T;z8|*h4~9t7o
=47×1.69T;z8|*h4~9t7o
=75.29T;z8|*h4~9t7o
（2）8.1÷0.9+0.1 请选择√×/j7a0S'^;I;](N1M7Y0X8h9T;z8|*h4~9t7o
=8.1÷19T;z8|*h4~9t7o
=8.19T;z8|*h4~9t7o
（1）
算式：提示2K6u1j;d)Y,X*h.L-f;d9T;z8|*h4~9t7o
（2）
算式：提示7v*Q8w-o9T;z8|*h4~9t7o