体育馆的看台一排有28个座位，爸爸和小奇去看比赛，他们俩坐在一起，并且小奇坐在爸爸的左边．在同一排有多少种不同的坐法？
×= 1÷= 4×60%= 0.875÷0.125=÷2= 10÷=×3.6= 0×=
直接写得数．== 1÷40%=== 72×25%==
直接写出下列题目的得数． 7+66.3=÷=×÷= 14÷=÷20%=（+）×20=
口算．============
直接写得数×12= 0.45×2= 34×0.2=÷2= 10×= 9.9+2.43+0.1=×= 6.8×2.5=
×
= 1÷
= 4×60%= 0.875÷0.125=
=
×3.6= 0×
=
=
= 1÷40%=
=
= 72×25%=
=
÷
=
×
÷
=
=
÷20%=（
+
）×20=
=
=
=
=
=
=
=
=
=
=
=
=
×12= 0.45×2= 34×0.2=
÷2=
= 9.9+2.43+0.1=
×
= 6.8×2.5=
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