15.28﹣3.99﹣9.01 10.7﹣2.9×0.2÷0.58
8.9+3.01= 1- + = 1.2×5= 3.8÷0.038=
÷ = 3604÷62≈ 0.62-0.32= 1÷10%=
( - )×24= ×8÷ ×8=
竿高 / 米
0
2
3
4
5
6
……
影长 / 米
3.0
4.5
6.0
7.5
9.0
3.2÷0.01= 5.6+3.99= ÷ =
× = 4.1+1÷2=