用简便方法计算(1)6.35-57+4.65-27=(2)813÷7+17×513=(3)34×0.25×43×4=-数学

题文

用简便方法计算
(1)6.35-
5
7
+4.65-
2
7
=
(2)
8
13
÷7+
1
7
×
5
13
=
(3)
3
4
×0.25×
4
3
×4=
题型:解答题  难度:中档

答案

(1)6.35-
5
7
+4.65-
2
7

=6.35+4.65-(
5
7
+
2
7
),
=11-1,
=10;

(2)
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


(3)
3
4
×0.25×
4
3
×4
=(
3
4
×
4
3
)×(0.25×4),
=1×1,
=1.

据专家权威分析,试题“用简便方法计算(1)6.35-57+4.65-27=(2)813÷7+17×513=(3)34×0...”主要考查你对  运算定律和简便算法  等考点的理解。关于这些考点的“档案”如下: