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4ab/3d×6d/2a
dicoret coret aja ya
= (4ab)(6d)
-----------------
(3d)(2a)
= 4b
1b) 12bcd/5ac × 15ac²/18bc
= (12bcd)(15ac²)
------------------------
(5ac)(18bc)
= (2d)(3c)
----------------
(3)(3)
= 6cd
------------
9
= ⅔ cd
2a) 9ac²/8 ÷ 3c/4
= (9ac²)(4)
----------------
(8)(3c)
= (3ac) / 2
2b) 12ac / 35bd ÷ 42a²c / 7b²d
= (12ac)(7b²d) / (35bd)(42a²c)
= (2)(b) / (5)(7a)
= 2b / 35a