用递等式计算,能简算的要简算65-27+45-57=2-89÷54×316=34÷[56×(37-38)]16÷[1÷(35-310)]0.2x+9.7=49.718:14110:x-数学

题目简介

用递等式计算,能简算的要简算65-27+45-57=2-89÷54×316=34÷[56×(37-38)]16÷[1÷(35-310)]0.2x+9.7=49.718:14110:x-数学

题目详情

用递等式计算,能简算的要简算
6
5
-
2
7
+
4
5
-
5
7
=
2-
8
9
÷
5
4
×
3
16
=
3
4
÷[56×(
3
7
-
3
8
)]
1
6
÷[1÷(
3
5
-
3
10
)]
0.2x+9.7=49.7
1
8
1
4
1
10
:x
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
6
-class="stub"2
7
+class="stub"4
5
-class="stub"5
7

=class="stub"5
6
+class="stub"4
5
-(class="stub"5
7
+class="stub"2
7
),
=class="stub"49
30
-1,
=class="stub"19
30


(2)2-class="stub"8
9
÷class="stub"5
4
×class="stub"3
16

=2-class="stub"8
9
×class="stub"4
5
×class="stub"3
16

=2-class="stub"2
15

=class="stub"28
15


(3)class="stub"3
4
÷[56×(class="stub"3
7
-class="stub"3
8
)],
=class="stub"3
4
÷[56×class="stub"3
7
-56×class="stub"3
8
],
=class="stub"3
4
÷[24-21],
=class="stub"3
4
÷3,
=class="stub"3
4
×class="stub"1
3

=class="stub"1
4


(4)class="stub"1
6
÷[1÷(class="stub"3
5
-class="stub"3
10
)],
=class="stub"1
6
÷[1÷class="stub"3
10
],
=class="stub"1
6
÷class="stub"10
3

=class="stub"1
6
×class="stub"3
10

=class="stub"1
20


(5)0.2x+9.7=49.7,
0.2x+9.7-9.7=49.7-9.7,
0.2x=40,
0.2x÷0.2=40÷0.2,
x=200;

(6)class="stub"1
8
class="stub"1
4
=class="stub"1
10
:x,
class="stub"1
8
x=class="stub"1
4
×class="stub"1
10

class="stub"1
8
x=class="stub"1
40

class="stub"1
8
x×8=class="stub"1
40
×8,
x=class="stub"1
5

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