怎样简便怎样算(27+15)×3589×[34-(716-14)]113+1213×(52-13)3.5×72+65×7.2120÷[4.5×(1-89)]1115-(35-415)-数学

题目简介

怎样简便怎样算(27+15)×3589×[34-(716-14)]113+1213×(52-13)3.5×72+65×7.2120÷[4.5×(1-89)]1115-(35-415)-数学

题目详情

怎样简便怎样算
2
7
+
1
5
)×35
8
9
×[
3
4
-(
7
16
-
1
4
)]
1
13
+
12
13
×(
5
2
-
1
3
3.5×72+65×7.2120÷[4.5×(1-
8
9
)]
11
15
-(
3
5
-
4
15
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"2
7
+class="stub"1
5
)×35,
=class="stub"2
7
×35+class="stub"1
5
×35,
=10+7,
=17;

(2)class="stub"8
9
×[class="stub"3
4
-(class="stub"7
16
-class="stub"1
4
)],
=class="stub"8
9
×[class="stub"3
4
-(class="stub"7
16
-class="stub"4
16
)],
=class="stub"8
9
×[class="stub"3
4
-class="stub"3
16
],
=class="stub"8
9
×[class="stub"12
16
-class="stub"3
16
],
=class="stub"8
9
×class="stub"9
16

=class="stub"1
2


(3)class="stub"1
13
+class="stub"12
13
×(class="stub"5
2
-class="stub"1
3
),
=class="stub"1
13
+class="stub"12
13
×(class="stub"15
6
-class="stub"2
6
),
=class="stub"1
13
+class="stub"12
13
×class="stub"13
6

=class="stub"1
13
+2,
=2class="stub"1
13


(4)3.5×72+65×7.2,
=35×7.2+65×7.2,
=(35+65)×7.2,
=100×7.2,
=720;

(5)120÷[4.5×(1-class="stub"8
9
)],
=120÷[4.5×class="stub"1
9
],
=120÷0.5,
=240;

(6)class="stub"11
15
-(class="stub"3
5
-class="stub"4
15
),
=class="stub"11
15
-class="stub"3
5
+class="stub"4
15

=(class="stub"11
15
+class="stub"4
15
)-class="stub"3
5

=1-class="stub"3
5

=class="stub"2
5

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