下面各题,怎样简便就怎样算.1÷(13+34)×1336(45+14)÷310×1036.8×57+430×0.6834+1115+14-115.-数学

题目简介

下面各题,怎样简便就怎样算.1÷(13+34)×1336(45+14)÷310×1036.8×57+430×0.6834+1115+14-115.-数学

题目详情

下面各题,怎样简便就怎样算.
1÷(
1
3
+
3
4
)×
13
36
4
5
+
1
4
)÷
3
10
×
10
3
6.8×57+430×0.68
3
4
+
11
15
+
1
4
-
1
15
题型:解答题难度:中档来源:不详

答案

(1)1÷(class="stub"1
3
+class="stub"3
4
)×class="stub"13
36

=1÷class="stub"13
12
×class="stub"13
36

=class="stub"12
13
×class="stub"13
36

=class="stub"1
3


(2)(class="stub"4
5
+class="stub"1
4
)÷class="stub"3
10
×class="stub"10
3

=class="stub"21
20
÷class="stub"3
10
×class="stub"10
3

=class="stub"7
2
×class="stub"10
3

=class="stub"35
3


(3)6.8×57+430×0.68,
=6.8×57+43×6.8,
=6.8×(57+43),
=6.8×100,
=680;

(4)class="stub"3
4
+class="stub"11
15
+class="stub"1
4
-class="stub"1
15

=(class="stub"3
4
+class="stub"1
4
)+(class="stub"11
15
-class="stub"1
15
),
=1+class="stub"2
3

=1class="stub"2
3

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