5) 4/3+7/12 = (16+7)/12 = 23/12
6) 4/5 × 2 1/2 = 4/5× 5/2 = 2
7) 7/6 : 21/22 = 7/6×22/21 = 1/3 × 11/3 = 11/9
8) 24% din 1500 = 24/100 × 1500 = 24×15 = 360
9) 4/7 din 21/36 = 4/7 × 21/36 = 3/9 = 1/3
SUBIECTUL II
1) (3-1/3)×(9/8)^2 = 8/3 × 81/64 = 8×27/64 = 27/8
