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1284÷3÷4406÷7+429356-278+149(304-82)÷6642÷(3×2)189÷9-7.

题目详情
脱式计算
1284÷3÷4                   
406÷7+429                       356-278+149
(304-82)÷6                642÷(3×2)189÷9-7.
▼优质解答
答案和解析
(1)1284÷3÷4
=428÷4
=107;

(2)406÷7+429
=58+429
=487;

(3)356-278+149
=78+149
=227;

(4)(304-82)÷6
=222÷6
=37;

(5)642÷(3×2)
=642÷6
=107;

(6)189÷9-7
=21-7
=14.