Question

Calculati:
3 5 3 2
a)5x[5+5x(5-5:5)]+3x5;

10 8 7 5
b) (6+2:2) :10-9x10;

38 37 45 44
c)7 : 7 : 7+3 : 3 : 3;

6 ( 2)3 2
d)7:{7+7x(7-(7 ) + 1] }+2x7 -69

[ajutor mult]

Answer 1

Răspuns

Explicație pas cu pas:

a)5x[5+5x(5-5:5)]+3x5 = 5x[5+5x(5-1)]+3x5 = 5x(5+5x4)+3x5 = 5x(5+20)+3x5 = 5x25 +3x5  = 125 + 15 = 140

b) (6+2:2) :10-9x10 = (6 + 1) : 10 - 90 = 7:10 - 90 = 0.7 - 90 = -89,3

c) 7 : 7 : 7+3 : 3 : 3 = 1/7 + 1/3 = 3/21 + 7/21= 10/21

d) Te rog reverifica daca ai copiat bine. Nu se inchid toate parantezele.