45×3.5+5.5×80%+0.8(8.8-23.4×13)÷5987.8-(7.58-3.8)1318÷(56+23×38)211×(11+44)+35÷12558×0.25+0.375×14解方

题目简介

45×3.5+5.5×80%+0.8(8.8-23.4×13)÷5987.8-(7.58-3.8)1318÷(56+23×38)211×(11+44)+35÷12558×0.25+0.375×14解方

题目详情

4
5
×3.5+5.5×80%+0.8
(8.8-23.4×
1
3
)÷
5
9
87.8-(7.58-3.8)
13
18
÷(
5
6
+
2
3
×
3
8
)
2
11
×(11+44)+
3
5
÷
1
25
5
8
×0.25+0.375×
1
4
解方程:
1
3
1
20
=1
7
9
:x


6x+
1
5
=0.8×1.5.
题型:解答题难度:中档来源:不详

答案

class="stub"4
5
×3.5+5.5×80%+0.8,
=0.8×3.5+5.5×0.8+0.8,
=0.8×(3.5+5.5+1),
=0.8×10,
=8;

②(8.8-23.4×class="stub"1
3
)÷class="stub"5
9

=(8.8-7.8)×class="stub"9
5

=class="stub"9
5

=1class="stub"4
5


③87.8-(7.58-3.8),
=87.8-3.78,
=84.02;

class="stub"13
18
÷(class="stub"5
6
+class="stub"2
3
×class="stub"3
8
),
=class="stub"13
18
÷(class="stub"5
6
+class="stub"1
4
),
=class="stub"13
18
×class="stub"12
13

=class="stub"2
3


class="stub"12
11
×(11+44)+class="stub"3
5
÷class="stub"1
25

=class="stub"12
11
×55+class="stub"3
5
×25,
=60+15,
=75;

class="stub"5
8
×0.25+0.357×class="stub"1
4

=(class="stub"5
8
+class="stub"3
8
)×class="stub"1
4

=class="stub"1
4


class="stub"1
3
class="stub"1
20
=1class="stub"7
9
:x,
class="stub"1
3
x=class="stub"1
20
×class="stub"16
9

class="stub"1
3
x=class="stub"4
45

class="stub"1
3
class="stub"1
3
=class="stub"4
45
÷class="stub"1
3

x=class="stub"4
15


⑧6x+class="stub"1
5
=0.8×1.5,
6x+0.2=1.2,
6x+0.2-0.2=1.2-0.2,
6x=1,
6x÷6=1÷6,
x=class="stub"1
6

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