Question

帮我解几道小学计算题

要用简便算法 实在不行算出得数就行了 如果是简便算法我会追加分数的 http://hiphotos.baidu.com/575799790/pic/item/5fb3c7fe0231d3275c600815.jpg ←点开

Answer 1

简便方法:
1
4/7
*
23又12/13+16
*
1/7+1/7*
4/13
=4/7
*
23又12/13+4
*
4/7+4/7*
1/13
=4/7
*
(23又12/13+4+
1/13)
=4/7
*
(311/13+1/13+
4)
=4/7
*
(312/13+4)
=4/7
*
(24+4)
=16
2
(5又5/9
+2又4/9-4/5)*(7.6*
5/4+
12/5*
5/4)
=(8-
4/5)*(9.5+3)
=90
3
111/25*
8/37+
31/37*
111/25+36/37
*
111/25
=111/25*
(8/37+31/37+36/37)
=111/25*
75/37
=9
4
0.25/(0.0135
÷0.054)
=0.25/0.25
=1
哎~~~累死我了
一定要选我为正确答案哦!