1. (25 + ( –6 ) ) x 25 :.... 2. kpk dan fpb dari 20, 48,dan 72 3. 2 per tiga x 2 2 per 5 : 1 1per 2 pk caranya.... ya.....

1. (25 - 6) x 25 = 19 x 25 = 475
2. 20 = 2² x 5
48 = 2 x2x2x2x3
72 = 2x2x2x3x3
fpb = 2 x 2 = 4
kpk = 2 x 2 x 2 x 2 x 3 x3 x 5
= 16 x 9 x 5
= 720

3. = 2/3 x 2 2/5 : 1 1/2
= 2/3 x 12/ 5 x 2/3
= 8/5 x 2/3
= 16 / 15
= 1 1/15