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Felie123
a fost răspuns

Exercitiul 1.25x4:2:10+350:7:5x10=
12x5-(121:11-630:63)x5]:55=

2.Compará cele doua expresii,
Exercitiul 2.(473+2x23-480 :12)x(6-3 patratica liberá (57x14 ):(80:4 :10)

Aflá valoarea lui a.
Exercitiul 3.50+a - [903:43:3 x(138540-138448)] =46

Rezolvati va rog dau coronita.!!!

Răspuns :

Spidie
1.
25×4÷2÷10+350÷7÷5×10= 100÷2÷10+50÷5×10= =50÷10+10×10=5+100=105

[12x5-(121÷11-630÷63)×5]÷55=[60-(11-10)×5]÷55=[ 60-55]÷55=5/55=1/11


2.
(473+2×23-480÷12)×(6-3)=(473+46-40)×3=479×3=1437
                     >

(57×14)÷(80÷4÷10)=798÷(20÷10)=798÷2=399

3.
50+a -[903÷43÷3×(138540-138448)]   =46
50+a-46-(21÷3×92)=0
4+a-(7×92)=0
4+a-644=0
a=644-4
a=640









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