4.72+2.28= 0.12= 4a+5a-3a= 8.5-0.34-1.66=
0.7-0.07= 0.3÷100= 1.01×10= 1-0.25+0.75=
16÷x=2.5
8.4x+3x=228
1.5x-4×2.1=2.1
5(x-4.5)=40
8×500= 300÷10= 2×35= 200×5=
140÷20= 68÷4= 15×8= 51÷3=
4.5÷0.9= 1.4-0.9= 0.3×0.8= 0÷3.7= 3.2+1.6=
0.3×21= 1.5÷5= 2.2×4= 0.48÷0.4= 8÷0.1=
1.8÷0.9= 3.6÷6= 4.5÷0.5= 2.1÷0.3=
1÷11=0.0909… 2÷11=0.1818… 3÷11=0.2727… 4÷11=0.3636…
据统计图回答下列问题: