画一个三角形，使它的面积与五边形（如图）面积相等．
口算．==== 0.125×8== 0.37+1.3=== 2008×99+2008=
直接写出各题得数． 0.4÷40%= 0.64+3.6= 0.25×4= 0.56×=×= 5.6÷0.1%=÷2=×=÷3+3÷= 6.73×99+6.73=
直接写出结果． 1÷=÷10= 6×= 1﹣75%=÷=×= 5÷1%= 4÷=
×24= 0.2×25%=（）×20=== 2.5÷0.25= 0÷1= 42﹣4×2=
直接写出得数．×= 2+0.8=﹣=（﹣）×30=+=÷5=÷= 4×÷4×=
=
=
=
=
= 0.37+1.3=
=
= 2008×99+2008=
=
×= 5.6÷0.1%=
÷2=
×
=
÷3+3÷==×= 5.6÷0.1%=÷2=×=÷3+3÷=
=
÷10= 6×
= 1﹣75%=
÷
=
×
= 5÷1%= 4÷
=
×24= 0.2×25%=（
）×20=
=
= 2.5÷0.25= 0÷1= 42﹣4×2=
×
= 2+0.8=
﹣
=（
）×30=
+
=
÷5=
÷
= 4×
÷4×
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