7.28+2.2=
8.85-6.15=
10-7.6=
0.85+0.2=
0.54-0.4=
100×0.75=
3.6÷10=
125×8-125×8=
4.8+2.1= 6.7-0.5= 0÷280= 264-(64+23)=
9-2.9= 4.2+8= 32-2×0= 6×6÷6×6=