过点A画直线a的垂线，标垂足为点B，并从点B引一条射线BC，使∠ABC的度数为75°．
直接写出得数×﹦ 9÷﹦÷﹦ 1×÷1×﹦﹢﹦×2﹦ 27×﹦ 0÷﹦÷1÷﹦××9﹦
直接写出得数．÷6= 15÷=×=÷= 42×=﹣60%= 10﹣99%= 40%×=
直接写出得数． 24×= 1÷=×12=×18÷3=÷=（﹣）×=×÷×=
直接写得数．============
直接写得数．×=×12=×=÷=÷= 9×=÷═÷12=
×
﹦ 9÷
﹦
÷
﹦ 1×
÷1×
﹦
﹢
﹦
×2﹦ 27×
﹦ 0÷
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÷1
÷
×
×9﹦
÷6= 15÷
=
×
=
÷
= 42×
=
﹣60%=
=
= 1÷
=
×12=
×18÷3=
÷
=（
﹣
）×
=
×
÷
=
=
=
=
=
=
=
=
=
=
=
=
×
=
×12=
×
=
÷
=
÷
= 9×
=
÷
═
÷12=
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