(1)713+712+613+512(2)1-34×1621-37(3)(14+35)×57(4)718×89+718÷9.-数学

题目简介

(1)713+712+613+512(2)1-34×1621-37(3)(14+35)×57(4)718×89+718÷9.-数学

题目详情

(1)
7
13
+
7
12
+
6
13
+
5
12
(2)1-
3
4
×
16
21
-
3
7
(3)(14+
3
5
)×
5
7
(4)
7
18
×
8
9
+
7
18
÷9.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
13
+class="stub"7
12
+class="stub"6
13
+class="stub"5
12

=(class="stub"7
13
+class="stub"6
13
)+(class="stub"7
12
+class="stub"5
12

=1+1
=2;

(2)1-class="stub"3
4
×class="stub"16
21
-class="stub"3
7

=1-class="stub"4
7
-class="stub"3
7

=1-(class="stub"4
7
+class="stub"3
7

=1-1
=0;

(3)(14+class="stub"3
5
)×class="stub"5
7

=14×class="stub"5
7
+class="stub"3
5
×class="stub"5
7

=10+class="stub"3
7

=10class="stub"3
7


(4)class="stub"7
18
×class="stub"8
9
+class="stub"7
18
÷9
=class="stub"7
18
×class="stub"8
9
+class="stub"7
18
×class="stub"1
9

=class="stub"7
18
×(class="stub"8
9
+class="stub"1
9

=class="stub"7
18
×1
=class="stub"7
18

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