竿高/m
1
2
4
6
7
影长/m
0.8
1.6
4.8
14 -41 -36 0 54 -19
a =。
4.25小时=分 48千克比千克少20%
①×65+0.75×34÷75%
②()×15×9
③
④86.4-(0.53+6.4)-147%
6.75+2.25= 1.02-0.6= 0.7÷0.01= 4.5+ =
2.5×12= 46×10%= + = 4-1÷3=