30×23=
40×50=
6.7-4.5=
90÷2=
25+75÷5=
4.1+5.8=
156÷4=
16×6-8=
( )
100﹣27.5= += 90×= 0.72÷0.6=
1.25×0.8= ÷75%= 96×65%+96×35%= 12÷×=