用递等式计算(怎样简便怎样算).15+38+4589-23+131719+0.6-171958-(58-12).-数学

题目简介

用递等式计算(怎样简便怎样算).15+38+4589-23+131719+0.6-171958-(58-12).-数学

题目详情

用递等式计算(怎样简便怎样算).
1
5
+
3
8
+
4
5

8
9
-
2
3
+
1
3

17
19
+0.6-
17
19

5
8
-(
5
8
-
1
2
)
题型:解答题难度:中档来源:不详

答案

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

=class="stub"1
5
+class="stub"4
5
+class="stub"3
8

=1+class="stub"3
8

=1class="stub"3
8


(2)class="stub"8
9
-class="stub"2
3
+class="stub"1
3

=class="stub"8
9
-(class="stub"2
3
-class="stub"1
3
),
=class="stub"8
9
-class="stub"1
3

=class="stub"5
9


(3)class="stub"17
19
+0.6-class="stub"17
19

=class="stub"17
19
-class="stub"17
19
+0.6,
=0+0.6,
=0.6;

(4)class="stub"5
8
-(class="stub"5
8
-class="stub"1
2
)

=class="stub"5
8
-class="stub"5
8
+class="stub"1
2

=0+class="stub"1
2

=class="stub"1
2

更多内容推荐