4/5×51-11÷5/4
= 4/5×(51-11)
= 4/5×50
=40
9/10÷{1/2×(6/5-3/10)}
=9/10÷{1/2×9/10}
=9/10×20/9
=2
阴影面积:30*30*1/2*1/2=225平方厘米
如果对你有帮助,请采纳.谢谢.
要采纳最先回答的正确答案,是对答题者劳动的尊重.祝进步!
4/5×51-11÷5/4
= 4/5×(51-11)
= 4/5×50
=40
9/10÷{1/2×(6/5-3/10)}
=9/10÷{1/2×9/10}
=9/10×20/9
=2
阴影面积:30*30*1/2*1/2=225平方厘米
如果对你有帮助,请采纳.谢谢.
要采纳最先回答的正确答案,是对答题者劳动的尊重.祝进步!