Question

Calculați maxim pana la 16:00!!! Va rogg e urgenttt

Answer 1

a) (1/2)÷3+(1/4)÷2+2=1/2×1/3+1/4×1/2+2=1/6+1/8+2/1

Amplificare pentru a avea 24 ca numitor comun

(4+3+48)/24=55/24

b) (1/6)÷4+(1/8)÷3+3=1/6×1/4+1/8×1/3+3=1/24+1/24+3/1

Amplificare pentru a avea 24 da numitor comun

(1+1+72)/24=74/24=37/12

c) 11/18+13/20+25/28

Numitor comun: 1260

Amplificam cu 70,63 si 45 prima, a doua respectiv a treia fractie

(770+819+1125)/1260=2714/1260=1357/630

d) 215/48-15/28+3/8=

Numitor comun: 336

Amplificam cu 7,12 si 42

(1505-180+126)/336=1451/336

e) 29/75-5/8+23/80

Numitor comun: 1200

Amplificam cu 16,150 si 15

(464-750+345)/1200=59/1200