Question

Calculati

a. 5 supra 4 + 5 supra 6 + 5 supra 12
b. 1 supra 11 + 1 supra 22 + 1 supra 33
c. 7 supra 180 + 7 supra 84 + 11 supra 210
d. 5 supra 32 + 7 supra 96 + 13 supra 288

Va rog am nevoie urgent!

Answer 1

a) numitorul comun este 12 , o ampificam pe prima cu 3 pe a doua cu 2 si pe a treia o lasam asa si avem:15/12+10/12+5/12=30/12

Answer 2

5+4+5/6+5/12=15/12+10/12+5/12=30/12=10/4=5/2

1/11+1/22+1/33=6/66+3/66+2/66=11/66=1/6

7/180+7/84+11/210=49/1260+105/1260+66/1260=220/1260=110/630=55/315=11/63
180=9x5x2x2=2 la 2x3 la 2x5
84=2la 2x3x7
210=2x5x3x7
2 la 2x3la2x5x7=1260

5/32+7/96+13/288=45/288+21/288+13/288=79/288