脱式计算,能简便的用简便方法①0.6×(3.6-2.4);②400÷25÷8+5×8;③8
脱式计算,能简便的用简便方法①0.6×(3.6-2.4);②400÷25÷8+5×8;③8×317÷〔1÷(315-2.95);④12.5×0.75-2.5×34+0.7...
脱式计算,能简便的用简便方法①0.6×(3.6-2.4);②400÷25÷8+5×8;③8×317÷〔1÷(315-2.95);④12.5×0.75-2.5×34+0.75.
展开
展开全部
(1)0.6×(3.6-2.4)
=0.6×1.2
=0.72
(2)400÷25÷8+5×8
=400÷(25×8)+40
=400÷200+40
=2+40
=42
(3)8×3
1
7
÷[1÷(3
1
5
-2.95)]
=8×3
1
7
÷[1÷(3
1
5
-2
19
20
)]
=8×3
1
7
÷(1÷
1
4
)
=8×3
1
7
÷4
=8×3
1
7
×
1
4
=6
2
7
(4)12.5×0.75-2.5×
3
4
+0.75
=0.75×(12.5-2.5+1)
=0.75×11
=8.25
=0.6×1.2
=0.72
(2)400÷25÷8+5×8
=400÷(25×8)+40
=400÷200+40
=2+40
=42
(3)8×3
1
7
÷[1÷(3
1
5
-2.95)]
=8×3
1
7
÷[1÷(3
1
5
-2
19
20
)]
=8×3
1
7
÷(1÷
1
4
)
=8×3
1
7
÷4
=8×3
1
7
×
1
4
=6
2
7
(4)12.5×0.75-2.5×
3
4
+0.75
=0.75×(12.5-2.5+1)
=0.75×11
=8.25
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询