8.47﹣3.98=
0.125+=
4.5×=
×0.25+×0.25=
①x+0.5x=4.2
②
③(48-2x)×=7.5
①9.52÷3.4+4.8×0.375
②18.67﹣(5.77+4.17)﹣4.23
③31.3×8.1+12.5×6.1+43.8×1.9
④×+++
⑤2.31+[(4.75-×0.4)×]