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
问题描述:
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
(10×30-20 )÷20-60÷15
=(300-20)÷20-4
=280÷20-4
=14-4
=10