剧场楼上有118个座位，楼下有348个座位，有450个同学一起去看电影，还有多少个空座位？
直接写出结果
45+38=
÷3= 4.2÷0.07= 11×
=
0.875×24= 1÷
= 7.2×
= 8﹣
=
0.25﹣
=
×0÷
=
口算．
3.7+0.63= 3.2×
= 8﹣
= 2.5×6.7×4=
75×99= 81÷
=
+=
×（8+5）×
=
直接写出得数：
8×
=
÷12=
×
= 0×
=
3﹣
=
×
=5÷
=
÷
=
÷
=（
+
）×16= 0.8×1.5=
﹣1÷3=
直接写出得数．
10÷0.01= 8×（1﹣0.75）= 11﹣1
﹣2.125= 0.045×
=
5÷
÷4= 1÷8﹣1÷8= 9.98﹣（2.98+1.2）= 7
﹣（1﹣0.5）=
直接写得数．
2﹣
= 352+198=
+
=
1.03+0.07= 32÷1000=
×
=
1÷
= 0.7：0.25=