Question

știind că a = 71 - 72:9; b = 2 x (7 +21): 8; c= 507 – 63 x 8, calculează: c) bx (a +c); a) a:bic - b) 2Xa - 7xC d) (a x b) - (a x c).​

Answer 1

Răspuns:

a=71-72:9

=71-8

=63

b=2x(7+21):8

=2x28:8

=56:8

=7

c=507-63x8

=507-504

=3

a)bx(a+c)=7x(63+3)

=7x66

=462

b)a:bxc= 63:7x3

=6x3

=18

c)2xa- 7xc=2x63-7x3

=126-21

=105

d) (axb)-(axc)=(63x7)-(63x3)

=441-189

252