灵活、合理的计算(79+56-14)×72237+359-337+149+1471823÷85+1823×3815÷[(23+15)×113]8.3×513+5.7×513-513.-数学

题目简介

灵活、合理的计算(79+56-14)×72237+359-337+149+1471823÷85+1823×3815÷[(23+15)×113]8.3×513+5.7×513-513.-数学

题目详情

灵活、合理的计算
7
9
+
5
6
-
1
4
)×72
2
3
7
+3
5
9
-3
3
7
+1
4
9
+1
4
7
18
23
÷
8
5
+
18
23
×
3
8
1
5
÷[(
2
3
+
1
5
)×
1
13
]
8.3×
5
13
+5.7×
5
13
-
5
13
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"7
9
+class="stub"5
6
-class="stub"1
4
)×72
=class="stub"7
9
×72+class="stub"5
6
×72-class="stub"1
4
×72,
=56+60-18,
=98;

(2)2class="stub"3
7
+3class="stub"5
9
-3class="stub"3
7
+1class="stub"4
9
+1class="stub"4
7

=(2class="stub"3
7
+1class="stub"4
7
-3class="stub"3
7
)+(3class="stub"5
9
+1class="stub"4
9
),
=class="stub"4
7
+5,
=5class="stub"4
7


(3)class="stub"18
23
÷class="stub"8
5
+class="stub"18
23
×class="stub"3
8

=class="stub"18
23
×class="stub"5
8
+class="stub"18
23
×class="stub"3
8

=(class="stub"5
8
+class="stub"3
8
)×class="stub"18
23

=1×class="stub"18
23

=class="stub"18
23


(4)class="stub"1
5
÷[(class="stub"2
3
+class="stub"1
5
)×class="stub"1
13
]
=class="stub"1
5
÷[class="stub"13
15
×class="stub"1
13
],
=class="stub"1
5
÷class="stub"1
15

=3;

(5)8.3×class="stub"5
13
+5.7×class="stub"5
13
-class="stub"5
13

=(8.3+5.7-1)×class="stub"5
13

=13×class="stub"5
13

=5.

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