用递等式计算下面各题:(1)(0.125×8-0.5)×4 ...

2025-06-27 03:31:49
推荐回答(1个)
回答1:

(1)(0.125×8-0.5)×4,
=(1-0.5)×4,
=0.5×4,
=2;

(2)
9
20
÷6+
1
6
×
1
20

=
9
20
×
1
6
+
1
6
×
1
20

=(
9
20
+
1
20
)×
1
6

=
1
2
×
1
6

=
1
12


(3)
5
6
×0.25+
1
4
×
1
6
       
=
5
6
×
1
4
+
1
4
×
1
6

=(
5
6
+
1
6
)×
1
4

=1×
1
4

=
1
4


(4)4-[3.75×(1.2-
1
3
)+
3
4
]
=4-[3.75×(
6
5
-
1
3
)+
3
4
],
=4-[3.75×
6
5
-3.75×
1
3
+0.75],
=4-[4.5-1.25+0.75],
=4-4,
=0.