递等式计算.(1)46×8-120÷1q(2)1.02÷(q+0.4×0.2q)(着)712÷9+19×q12(4)2着+(4q-2着)×q着.-数学

题目简介

递等式计算.(1)46×8-120÷1q(2)1.02÷(q+0.4×0.2q)(着)712÷9+19×q12(4)2着+(4q-2着)×q着.-数学

题目详情

递等式计算.
(1)46×8-120÷1q
(2)1.02÷(q+0.4×0.2q)
(着)
7
12
÷9+
1
9
×
q
12

(4)
2
+(
4
q
-
2
)×
q
题型:解答题难度:中档来源:不详

答案


(y)4六×8-y20÷y它,
=y六8-8,
=y六0;

(2)y.02÷(它+0.4×0.2它),
=y.02÷(它+0.y),
=y.02÷它.y,
=0.2;

(y)class="stub"2
y2
÷9+class="stub"y
9
×class="stub"它
y2

=class="stub"2
y2
×class="stub"y
9
+class="stub"y
9
×class="stub"它
y2

=(class="stub"2
y2
+class="stub"它
y2
)×class="stub"y
9

=y×class="stub"y
9

=class="stub"y
9


(4)class="stub"2
y
+(class="stub"4
-class="stub"2
y
)×class="stub"它
y

=class="stub"2
y
+class="stub"2
y它
×class="stub"它
y

=class="stub"2
y
+class="stub"2
9

=class="stub"8
9

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