Question

Calculează respectând ordinea efectuării operaţiilor:
7x7 -(7x7 - 7x7:7 + 7): (7 - 7:7x7:7 + 7:7) =
b) (9 + 9x9):9-(9:9x9-9x9:9+9:9x9:9x 9) =
c) (4x4:4 - 4:4) 4:4-(4-4:4+4x4:4:4-4:4) =​

Answer 1

Răspuns:

a) 42

b) 1

c) 0

Explicație pas cu pas:

a)   7x7-(7x7-7x7:7+7):(7-7:7x7:7+7:7)=

=49-(49-49:7+7):(7-1x1+1)=

=49-(49-7+7):(7-1+1)=

=49-(49-14):(7-2)=

=49-35:5=49-7=42

b)   (9+9x9):9-(9:9x9-9x9:9+9:9x9:9x9)=

=(9+81):9-(1x9-9x1+1x1x9)=

=90:9-(9-9+9)=10-9=1

c)   (4x4:4-4:4)4:4-(4-4:4+4x4:4:4-4:4)=

=(4x1-1)1-(4-1+4x1:4-1)=

=(4-1)1-(3+4:4-1)=

=3x1-(3+1-1)=3-2-1=1-1=0