76.276.2×1.3 4.25×1.842.5×0.18
①2.523.6=
②9.9101=
③1.7×4.2+1.7×5.8=
④3.6×2.8=
⑤7.08÷0.8÷1.25
⑥15.311(商用循环小数表示)
5.4x-x=13.2 3(x+2.1)=10.5
+0.625= ×= 24÷40%= 7.2÷0.9÷0.8=