5700300057000030 42798043万 -13℃5℃
1.02+0.8=
368﹣299=
0.1×0.99=
+ =
0.52﹣0.42=
÷ =
1÷0.25=
× =
7.5﹣ ﹣ =
( ﹣ )×30=
1﹣ + =
1÷ ×2=.