350×0.02= 1﹣25%= 1+15%= 12﹣7.9=×
=
﹣
= (
﹣
)×24= 16×
=
131131÷131= ×
×0= 1÷
﹣
÷1= 12.5×0.08=
0.9+99×0.9= 7.8×0.25×4= ﹣
+
= 0.52×100=
×8+8×
=
×21×
= 98﹣0.23﹣0.77=
+
÷
=
44÷= 9300÷5÷6= 0÷
= 1997+1998+1999+6=