9.5+4.2=
0.8×1.3=
14.1÷3=
=
8.1-2.7=
1.4×0.3=
7.9+0.1=
2.4×5=
= = =
树高/米
1
2
3
4
5
影长/米
0.5
1.0
1.5
2.0
2.5
①772-317+128-283
②2.4÷( -20%)
③1-
④5.125× +2.875÷4
⑤