早教吧 育儿知识 作业答案 考试题库 百科 知识分享

用递等式计算,能简算的要用简便方法计算.101+26×329.8×0.7-8.8×0.734+(12-25)×58813÷7+17×513.8+1.34+0.66+4.23÷34×(45-310)

题目详情
用递等式计算,能简算的要用简便方法计算.
101+26×32
9.8×0.7-8.8×0.7
3
4
+(
1
2
-
2
5
)×
5
8
8
13
÷7+
1
7
×
5
13
8+1.34+0.66+4.2
3
4
×(
4
5
-
3
10
▼优质解答
答案和解析
(1)101+26×32,
=101+832,
=933;

(2)9.8×0.7-8.8×0.7,
=(9.8-8.8)×0.7,
=1×0.7,
=0.7;

(3)
3
4
+(
1
2
-
2
5
)×
5
8

=
3
4
+
1
10
×
5
8

=
3
4
+
1
16

=
13
16


(4)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(5)8+1.34+0.66+4.2,
=8+(1.34+0.66)+4.2,
=8+2+4.2,
=10+4.2,
=14.2;

(6)3÷
3
4
×(
4
5
-
3
10
),
=3÷
3
4
×
1
2

=4×
1
2

=2.