下面各题怎样算简便就怎样算.(1)49×914÷421(2)0.8+12÷56(3)(47+38)×56(4)38+47+14×25(5)(0.25+13)×(1.6÷45)(6)34×[1÷(56+

题目简介

下面各题怎样算简便就怎样算.(1)49×914÷421(2)0.8+12÷56(3)(47+38)×56(4)38+47+14×25(5)(0.25+13)×(1.6÷45)(6)34×[1÷(56+

题目详情

下面各题怎样算简便就怎样算.
(1)
4
9
×
9
14
÷
4
21
(2)0.8+
1
2
÷
5
6
(3)(
4
7
+
3
8
)×56
(4)
3
8
+
4
7
+
1
4
×
2
5
(5)(0.25+
1
3
)×(1.6÷
4
5
)
(6)
3
4
×[1÷(
5
6
+
3
4
)]
题型:解答题难度:中档来源:不详

答案

(1)class="stub"4
9
×class="stub"9
14
÷class="stub"4
21

=class="stub"4
9
×class="stub"9
14
×class="stub"21
4

=class="stub"3
2


(2)0.8+class="stub"1
2
÷class="stub"5
6

=0.8+0.6,
=1.4;

(3)(class="stub"4
7
+class="stub"3
8
)×56

=56×class="stub"4
7
+class="stub"3
8
×56,
=32+21,
=53;

(4)class="stub"3
8
+class="stub"4
7
+class="stub"1
4
×class="stub"2
5

=class="stub"3
8
+class="stub"4
7
+class="stub"1
10

=class="stub"53
56
+class="stub"1
10

=class="stub"293
280


(5)(0.25+class="stub"1
3
)×(1.6÷class="stub"4
5
)

=class="stub"7
12
×2,
=class="stub"7
6


(6)class="stub"3
4
×[1÷(class="stub"5
6
+class="stub"3
4
)]

=class="stub"3
4
×(1÷class="stub"19
12
),
=class="stub"3
4
×class="stub"12
19

=class="stub"9
19

更多内容推荐