以学校为观察点，根据下面条件在平面图上标出各场所的位置，比例尺1：50000．（1）图书馆在学校东偏北45°，1500m处．（2）体育场在学校西偏北30°，2000m处．（3）少年宫在学校南1750m处．
直接写得数×15= ×2= ×= ×= ×=1×= ×= ×34= ×= ×=×= ×= ÷10= ÷= 0÷=÷4= 1÷= 22÷= ÷= ÷0.4=
直接写出得数．×25= ÷6= 0.54+O.46= 9﹣=（）×30= = 177+99= 3÷7== 0.9×99+0.9=
×16= ×= ﹣= ×=6÷= ÷= ÷4= ÷=+= ﹣= 100×= 8×=1÷= ﹣= 12÷= 0×=
直接写得数．×0= ×= ×12= ×=45×= ÷= ×= ÷=18×= ×= 1÷= ÷=
直接写出得数．×12= ÷= （ ）2= 4﹣4×= 1×= 43÷=÷= ×8+×8= 0.9×= 12×﹣= ×7÷×7= =
×15= 
×2= 
×
= 
×
= 
×
=
= 
×
= 
×34= 
×
= 
×
=
×
= 
×
= 
÷
= 0÷
=
÷4= 1÷
= 22÷
= 
÷
÷0.4=
×25= 
÷6= 0.54+O.46= 9﹣
=
）×30= 
= 177+99= 3÷7=
= 0.9×99+0.9=
×16= 
×
= 
﹣
= 
×
=
= 
÷
= 
÷4= 
÷
=
+
= 
﹣
= 100×
= 8×
= 
﹣
= 12÷
= 0×
=
×0= 
×
= 
×12= 
×
=
= 
÷
= 
×
= 
÷
=
= 
×
= 1÷
= 
÷
=
×12= 
÷
= （ 
）2= 4﹣4×
= 1
×
= 43÷
=
÷
= 
×8+
×8= 0.9×
= 12×
﹣
×7÷
=
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