早教吧 育儿知识 作业答案 考试题库 百科 知识分享

脱式计算.645÷3÷549×9÷7(902-284)÷6677+549÷972×16-648.

题目详情
脱式计算.
645÷3÷5             
49×9÷7             
(902-284)÷6
677+549÷9           
72×16-648.
脱式计算.
645÷3÷5             
49×9÷7             
(902-284)÷6
677+549÷9           
72×16-648.





▼优质解答
答案和解析
(1)645÷3÷5             
=215÷5
=43

(2)49×9÷7        
=441÷7
=63
     
(3)(902-284)÷6
=618÷6
=103

(4)677+549÷9           
=677+61
=738

(5)72×16-648
=1152-648
=504