0.25+0.5=
3.2-0.22=
1-0.07=
5.54+4.6=
0.87+0.06=
4-2.6=
0.37+0.3=
2+0.1-2+0.1=
0.66-0.6= 2.8+3.2= 0.85+0.5= 9.9+0.1-9.9+0.1=
3.8+2= 4.6-0.6= 130×6= 64÷16= 13-5.4+2.6=
360÷6= 8-2.7= 15×80= 4.25+2.75= 7.2-3.3-0.7=
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]