从+,-,×,÷,【】中选去适当的符号添在等号左边,使等式成立5 5 5 5 5 =1 5 5 5 5 5 =3 9 9 9 9 9 =3 5 5 5 5 5 =2 5 5 5 5 5 =4 9 9 9 9 9 =20应该是9 9 9 9 9 =17
问题描述：
从+,-,×,÷,【】中选去适当的符号添在等号左边,使等式成立
5 5 5 5 5 =1 5 5 5 5 5 =3 9 9 9 9 9 =3 5 5 5 5 5 =2 5 5 5 5 5 =4 9 9 9 9 9 =20
应该是9 9 9 9 9 =17
答
5-(5*5-5)/5=1 5-(5/5)-(5/5)=3 (9+9)/9+(9/9)=3 (5+5)/5+5-5=2 5-(5/5)*(5/5)=4 (9+9)/9+9+9=20
(9×9-9)÷9+9=17
答
(5-5)*5+5/5=1
(5*5+5)5/5=1
(5*5-5-5)/5=3
9*9/(9+9+9)=3
(5+5)/5+5-5=2
(5+5+5+5)/5=4
9+9+(9+9)/9=20
答
(5+5)÷5-5÷5＝1
(5+5)÷5+5÷5＝3
(9+9)÷9+9÷9＝3
(5+5+5-5)÷5＝2
(5+5+5+5)÷5＝4
(9+9)+(9+9)÷9=20
(9×9-9)÷9+9=17
(9÷9+9÷9)×9=18