0.56×7.3-0.56×6.3 125÷0.25÷0.4 10.9-5.01-4.99
2x﹣13=39 13x﹣7.5x=3.4
+25%= 1.5× = ÷2= 1÷ - ÷1=
1.25×2.4= 10-10%= ÷ =
①7.34 ×70%+ ×7.34
②9.6+10.4×25%
③250×(1+20% )×(1-10% )
①
②6×+13÷8-19×12.5%
③2.84+5.6-0.84+4.4
④