Question

1. Scrieti divizorii lui 2145.
2. Calculați :
a) 1/3 + 1/3 : 1/2
b) 14 x [ 1/4 + (5/2 - 1 intreg si 3/4 ) : 7/8 ] =

x -> ori , inmultire .
/ -> supra.

Answer 1

a)    1/3+1/3:1/2 dar 1/3: 1/2= 1/3+1/3×2/1=1/3+2/3=3/3=1  a)  suma = 1
b)  14× [ 1/4 + (5/2 - 13/4 ) : 7/8]=    (dar 1 si 3/4=13/4)
14×[ 1/4  + (10/4- 13/4):7/8]  aducem la acelasi numitor in paranteza mica
=14×[ 1/4  + +3/4:7/8]
=14×[ 1/4  + 3/4×8/7]
=14 × [1/4-6/7] aducem in paranteza la acelasi numitor
= 14 ×(-17/4)
b)    suma=59,5