1.3ab²/7×14a/15b=… 2.7a+14/9b:21a²/6b²=… 3.10a-5/4b:5ab/2=… 4.32p²q²/9r:4p²q/3r² tolong yahh kak please bantuuinn...

1) (3ab²/7) × (14a/15b)
= (3ab²) × (14a)
------------------------
7 × 15b
= ab × 2a
---------------
5
= 2a²b/5

2) (7a+14/9b) ÷ (21a²/6b²)
= (7a+14/9b × (6b²/21a²)
= (7a + 14) × (6b²)
---------------------------
(9b) × (21a²)
= 7(a + 2) × (6b²)
-------------------------
7(3a²) × (9b)
= (a + 2) × (2b)
----------------------
(3a²) × (3)
= 2b(a + 2)
------------------
9a²

3) (10a - 5)/4b ÷ 5ab/2
= (10a - 5)/4b × 2/5ab
= (10a - 5) × 2
---------------------
5ab × 4b
= 5(2a - 1) × 2
----------------------
5ab × 4b
= (2a - 1)
--------------------
ab × 2b
= 2a - 1
------------
2ab²

4) 32p²q²/9r : 4p²q/3r²
= 32p²q²/9r × 3r²/4p²q
= (32p²q²) × (3r²)
--------------------------
9r × 4p²q
= 8q × r
---------------
3
= 8qr / 3