Question

- nivel mediu şi maxim-
1. Se consideră numerele :
A = [25 + 5 x (5+5)] – 5
B = 25 + 6 x [30 – 100 : (8 – 4)] – 9 x 5
C = 20-5:[2-15: (18-15:5)]x4
Cerinţe:
a) aflati suma numerelor A, B si C
b) calculati 3 x A + 2 x (B + C


Dau corona repede​

Answer 1

Răspuns:

A=(25+5x10)-5

A=(25+50)-5

A=75-5

A=70

B=25+6x(30-100:4)-9x5

B=25+6x(30-25)-9x5

B=25+6x5-9x5

B=25+30-45

B=55-45

B=10

C=20-5:[2-15:(18-3)]x4

C=20-5:(2-15:15)x4

C=20-5:(2-1)x4

C=20-5:1x4

C=20-5x4

C=20-20

C=0

a)

70+10+0=80

b) 3xA+2x(B+C)

3x70+2x(10+0)

3x70+2x10

210+20

230