5×括号85-115÷13括号简便方法
5X(85-115÷13)
=5X(85-115/13)
=5X(85-8-11/13)
=5X77-55/13
=385-4-3/13
=381-3/13
=380又13分之10
=5X(85-115/13)
=5X(85-8-11/13)
=5X77-55/13
=385-4-3/13
=381-3/13
=380又13分之10
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第1个回答 2017-06-21
5×(85-115÷13)
=5×(85×13-115)÷13
=5×990÷13
=4950/13
=5×(85×13-115)÷13
=5×990÷13
=4950/13