3.6÷0.1=
7.2×0.3=
0.45+0.55=
0.56÷0.7=
0.07×0.8=
9.2-1.2=
0.16×0.5=
80.3÷20.02≈
树高/m
1
2
3
4
5
6
……
影长/m
1.5
3.0
4.5
6.0
7.5
9.0