社区小影院一排有25个座位，小燕陪爷爷奶奶看电影。三人坐在一起，小燕坐中间，爷爷居左，奶奶居右。在同一排有多少种不同的坐法？
直接写出得数=== 3×===== 8×==
直接写出得数．=====×+=﹣=+=
直接写数对又快： 1÷=+=÷=（﹣）×18=÷3=×=﹣=×÷×=
5.8+3=×= 6÷= 1÷﹣÷1= 2×10= 1÷3= 0.66÷= 1÷1+= 9÷3= 1÷0.8= 5.4×=×0.7+0.3=
直接写出得数．×1.2= 1÷2= 1.8÷=×÷×= （+﹣）×12= 3﹣÷0.75= 24÷8= 4÷﹣÷4=
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= 3×
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×
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﹣
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÷3=
×
﹣
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= 6÷
= 1÷
﹣
÷1= 2
=
= 1
÷1+
÷3= 1
÷0.8= 5.4×
=
×0.7+0.3=
×1.2= 1÷2
= 1.8÷
=
×
÷
+
﹣
）×12= 3﹣
÷0.75= 24
÷8= 4÷
﹣
÷4=
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