54÷4÷0.25
12.5×8.8
4.8÷( 1.2÷0.5 )
①4.952-1.752÷0.73
②69÷0.125÷8
③31.14÷(3.46×5)
3x﹣4×6.5=7.6 12.5x+x=108 *x-9.42=12.56
100-x=58.9 3(x-2.1)=8.4 *9.6÷x=3