378-14+34+185-16+56-1.-五年级数学

题目简介

378-14+34+185-16+56-1.-五年级数学

题目详情

3
7
8
-
1
4
+
3
4
+
1
8
5-
1
6
+
5
6
-1.
题型:解答题难度:中档来源:不详

答案

①3class="stub"7
8
-class="stub"1
4
+class="stub"3
4
+class="stub"1
8

=(3class="stub"7
8
+class="stub"1
8
)+(class="stub"3
4
-class="stub"1
4
),
=4+class="stub"1
2

=4class="stub"1
2


②5-class="stub"1
6
+class="stub"5
6
-1,
=(5-1)+(class="stub"5
6
-class="stub"1
6
),
=4+class="stub"2
3

=4class="stub"2
3

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