=4.2 ÷=27 74:=6:0.3
×33+66×62.5%+0.625 15.72-2.17-1.83
×[÷(-)] -÷2+5
10%+7%=
72=
×=
÷8=
50%﹣0.3=
3.14×3=
2﹣15%=
6.28÷2=
x-20%x=80 2x+15=27 5x-0.2=0.8
据统计图回答下列问题: