Question

Calculaţi: (doar alea încercuite) dau coroana ​

Answer 1

Răspuns:

Explicație pas cu pas:

"/"- fractie

a) 4/3 + 5/7 = (28+15)/21 = 43/21

b) 2/7 + 1/4 = (8+7)/28 = 15/28

d) 5/7 + 4/3 = (15+28)/21 = 43/21

e) 1/4 + 2/9 = (9+8)/36 = 17/36

i) 1/10 + 13/40 + 7/20 = (4+13+14)/40 = 31/40

j) 5/18 + 13/36 + 1/9 = (10+13+4)/36 = 27/36 = 3/4

k) 9/10 + 11/100 + 1/50 = (90+11+2)/100 = 103/100

l) 7/3 + 1/4 + 5/12 = (28+3+5)/12 = (31+5)/12 = 36/12 = 3.

m) 5/2 + 1/5 + 3/10 = (25+2+3)/10 = 30/10 = 3

n) 2/3 + 5/18 + 7/9 = (12+5+14)/18 = 31/18

q) 13/2 + 45/4 + 23/8 = (52+90+23)/8 = 165/8