问题
解答题
根据算式中的数的变化,填写运算符号:
(10______30______20 )______20______60______15
=(300______20)______20______4
=280______20______4
=14______4
=10
答案
(10×30-20 )÷20-60÷15
=(300-20)÷20-4
=280÷20-4
=14-4
=10
根据算式中的数的变化,填写运算符号:
(10______30______20 )______20______60______15
=(300______20)______20______4
=280______20______4
=14______4
=10
(10×30-20 )÷20-60÷15
=(300-20)÷20-4
=280÷20-4
=14-4
=10