脱式计算:[1-(12-14)]×23(51+3435)÷1734:X=3:1238×14+17×0.25+45×25%25:X=(1+17):5.-六年级数学

题目简介

脱式计算:[1-(12-14)]×23(51+3435)÷1734:X=3:1238×14+17×0.25+45×25%25:X=(1+17):5.-六年级数学

题目详情

脱式计算:
[1-(
1
2
-
1
4
)]×
2
3

(51+
34
35
)÷17
3
4
:X=3:12

38×
1
4
+17×0.25+45×25%
2
5
:X=(1+
1
7
):5.
题型:解答题难度:中档来源:不详

答案

(1)[1-(class="stub"1
2
-class="stub"1
4
)]×class="stub"2
3

=[1-class="stub"1
4
class="stub"2
3

=class="stub"3
4
×class="stub"2
3

=class="stub"1
2


(2)(51+class="stub"34
35
)÷17,
=(51+class="stub"34
35
)×class="stub"1
17

=51×class="stub"1
17
+class="stub"34
35
×class="stub"1
17

=3+class="stub"2
35

=3class="stub"2
35


(3)class="stub"3
4
:X=3:12

3x=class="stub"3
4
×12,
3x=9,
3x÷3=9÷3,
x=3;

(4)38×class="stub"1
4
+17×0.25+45×25%,
=(38+17+45)×0.25,
=100×0.25,
=25;

(5)class="stub"2
5
:X=(1+class="stub"1
7
):5,
class="stub"2
5
:X=class="stub"8
7
:5,
class="stub"8
7
X=class="stub"2
5
×5,
class="stub"8
7
X=2,
class="stub"8
7
class="stub"8
7
=2÷class="stub"8
7

X=class="stub"7
4

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