tolong di jawab ABCD 6 sampai 9!!

6.)16²-8²
=256 -64
=192 (c)
7.) 25²+√441
=625+21
=646(c)
8.) 12%;0,25;2/3;1 1/2 (b)
9.) 7 1/3 + 6 3/4
=22/3 + 27/4
=88 + 81 /12
=169/12
=14 1/12 (d)

maaf kalo salah