用坚式计算(前两题要验算).17﹣5.08 9.5+18.4 9.52﹣8.01 27.1+1.98.
8-x=3-x=
2x+3x=3.153.4x=8.6-1.8
2(200-15x)=70+25x3(2x+1)=12
0.92×1.41+0.92×8.59×-× 1.3×11.6-1.6×1.3×11.6+18.4×
13×÷29÷× 15.68+(5.39+4.32) 19.68-(2.97+9.68) 7+(-) 5-(-)