如图平行四边形的面积是 48cm2，从角顶点到对边中点连一条线，得到阴影部分的平行四边形面积是多少？
直接写得数． 10÷1%= 6.3×= 0×3.5= 4.2÷= 1.125×8=÷= 12﹣9.8= 3.6×2.5= 1.25××8=×2÷×2=
390×0.02=﹣= 5﹣1.4﹣1.6= 0.9﹣0.26= 81÷= 4×（0.6+1.9）= 0.23×400=×=﹣+= 0.9+99×0.9=
口算． 1.4×3=== 1.8+0.32== 36.1÷5.9≈ 298×31≈ 499+203≈
直接写出下面各题的结果． 28×2= 1.8+2.9= 4.8÷12= 10﹣0.9= 0.25×4=﹣=+=×= 1﹣75%=÷=
直接写得数 3.3+6.07= 5×5%= 8÷1.6= 567﹣99= 3÷27= 3﹣﹣= 5×÷5×=（+）×12=
= 0×3.5= 4.2÷
=
÷
= 12﹣9.8= 3.6×2.5=
×8=
﹣
= 5﹣1.4﹣1.6= 0.9﹣0.26=
= 4×（0.6+1.9）= 0.23×400=
×
=
﹣
+
= 0.9+99×0.9=
=
= 1.8+0.32=
= 36.1÷5.9≈ 298×31≈ 499+203≈
﹣
=
+
=
×
=
÷
=
﹣
= 5×
÷5×
+
）×12=
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