时=2时45分
4.038m3=m3dm3
810﹣340=
560÷70=
+ =
÷75%=
12.5×8÷12.5×8=
17×50=
3.48+5.52=
× =
7﹣ =
0.6÷0.25÷4=
①12.5×28﹣139
②101×69
③21.7﹣5.4﹣4.6
④0.6÷ ×
⑤( + ﹣ )×36
⑥ ×[ ﹣( ﹣ )]
① x- x=24
②
③ x+ x=
④24÷2x=4