怎样算简便就怎样算3×(215+112)-1424×(38+13+512)917÷7+17×8172627×28.-数学

题目简介

怎样算简便就怎样算3×(215+112)-1424×(38+13+512)917÷7+17×8172627×28.-数学

题目详情

怎样算简便就怎样算
3×(
2
15
+
1
12
)-
1
4
24×(
3
8
+
1
3
+
5
12
9
17
÷7+
1
7
×
8
17
26
27
×28.
题型:解答题难度:中档来源:不详

答案

(1)3×(class="stub"2
15
+class="stub"1
12
)-class="stub"1
4

=3×class="stub"13
60
-class="stub"1
4

=class="stub"13
20
-class="stub"5
20

=class="stub"2
5


(2)24×(class="stub"3
8
+class="stub"1
3
+class="stub"5
12
),
=24×class="stub"3
8
+24×class="stub"1
3
+24×class="stub"5
12

=9+8+10,
=27;

(3)class="stub"9
17
÷7+class="stub"1
7
×class="stub"8
17

=class="stub"9
17
×class="stub"1
7
+class="stub"1
7
×class="stub"8
17

=(class="stub"9
17
+class="stub"8
17
)×class="stub"1
7

=1×class="stub"1
7

=class="stub"1
7


(4)class="stub"26
27
×28,
=class="stub"26
27
×(27+1),
=class="stub"26
27
×27+class="stub"26
27

=26+class="stub"26
27

=26class="stub"26
27

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