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X:514=310:7204X=13:30%47÷421×X=8927×58=18÷34=1

2022-08-14 05:14:56 问答库 阅读 201 次

问题详情

X:5

14

=3

10

:7

20

4

X

=1

3

:30%

4

7

÷4

21

×X=8

9

2

7

×5

8

=

1

8

÷3

4

=125×1.6=12.56÷6.28=7×1

7

÷7×1

7

=

4

5

-1

3

=3.14×5=3.14×40=75×10%=

1

3

÷3-1

9

=

参考答案

(1)x:514=310:720,
720x=514×310,
720x×207=328×207,
x=1549;

(2)4X=13:30%,
13x=4×30%,
13x×3=1.2×3,
x=3.6;

(3)47÷421×x=89,
3x=89,
3x÷3=89÷3,
x=827;

(4)27×58=528;

(5)18÷34=16;

(6)125×1.6=200;

(7)12.56÷6.28=2;

(8)7×17÷7×17
=1÷7×17,
=17×17,
=149;

(9)45-13=715,

(10)3.14×5=15.7;

(11)3.14×40=125.6;

(12)75×10%=7.5;

(13)13÷3-19
=19-19,
=0.

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