302平方分米=平方米.
12.5﹣ =10.
12×0.3=
2.4÷0.4=
2.6×3=
81÷30=
7.5÷15%=
137+363=
﹣ =
0÷ =
693﹣99≈
394+105≈
88×32≈
1780÷94≈