pakai cara???????plizz

1). 10/3 × 5/2 = 50/6 = 25/3 = 8 ,1/3(pecahan)

2). (kurang paham)

3).2=180
3=X (kali silang)
> 2x = 3x180
>2x = 540
x= 540/2
x= 270 Km

4).40% = 40/100×200 = 4/10×200 = 2/5 × 200
= 400/5 = 80

5). jono : ali
25 : 35
5 : 7

6). (kurang paham)

7).41/2 - 47/4
= 82- 47 /4
=35/4
=8 ,3/4 (pecahan)

8).5=130
3=X (kali silang)
> 5x = 130×3
5x= 390
x = 390/5
x = 78 KM

9). 3 = 6
4= n kali silang
> 3n = 4×6
3n = 24
n =24/3
n = 8

10).9/2 × 4/7 = 36/14
36/14 : 3/5
= 36/14 × 5/3
= 180 / 42
= 90/21
= 30/7
= 4 ,2/7 (pecahan)
.
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Maaf Kalo Salah :)