计算:(1)1311×2239÷53(2)34×816-316÷94解方程:(3)0.8:4=x:8(4)89x=16×1651.-数学

题目简介

计算:(1)1311×2239÷53(2)34×816-316÷94解方程:(3)0.8:4=x:8(4)89x=16×1651.-数学

题目详情

计算:
(1)
13
11
×
22
39
÷
5
3

(2)
3
4
×
8
16
-
3
16
÷
9
4

解方程:
(3)0.8:4=x:8
(4)
8
9
x=
1
6
×
16
51
题型:解答题难度:中档来源:不详

答案

(1)class="stub"13
11
×class="stub"22
39
÷class="stub"5
3

=class="stub"2
3
÷class="stub"5
3

=class="stub"2
3
×class="stub"3
5

=class="stub"2
5


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

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

=class="stub"3
8
-class="stub"1
12

=class="stub"7
24


(3)0.8:4=x:8,
4x=0.8×8,
4x=6.4,
x=1.6;

(4)class="stub"8
9
x=class="stub"1
6
×class="stub"16
51

class="stub"8
9
x=class="stub"8
153

x=class="stub"8
153
÷class="stub"8
9

x=class="stub"1
17

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