1.4x+5.1x=83.2 2.5x+2.1×4=28.4 15-3.2x=7.64
7.6-0.6= 0.8×100= 1.9+9.1= 3.6÷0.9=
7.2÷8= 0.2×0.9= 5.1÷0.01= 4×1.5=
1.4+1.4÷1.4= 8.3×0.9+0.83=
300÷5÷2=300÷(52) 23×99=23×-23
5.2-0.2x=2.6
9(x-3)=63
6.2x+x=11+3.4
7÷x=3.5
x+36=78 4 - x = 1.2 (100-3x)÷2 =38
列综合算式计算: