Răspuns :
a). 24-15+11=20
b).7x(8+12)=7x20=140
c).5x(3x(17+15)-4x8)=5x(3x32-4x8)=5x(96-32)=5x64=320
d)(81-36x(15x1-13))x9=(81-36x2-13)x9=-4x9=-36
b).7x(8+12)=7x20=140
c).5x(3x(17+15)-4x8)=5x(3x32-4x8)=5x(96-32)=5x64=320
d)(81-36x(15x1-13))x9=(81-36x2-13)x9=-4x9=-36
a. 24-15+11 = 9+11 = 20.
b. 7(8+12)= 7 x 20 = 140.
c. 5x[3x(17+15)-32] = 5(3x32-32) = 5(96-32)=5x64= 320.
d. [81-26x(15x1-13)]x9 = [81-26x(15-13)]x9 =(81-26x2)x9 = (81-52)x9 = 29x9 = 261.
b. 7(8+12)= 7 x 20 = 140.
c. 5x[3x(17+15)-32] = 5(3x32-32) = 5(96-32)=5x64= 320.
d. [81-26x(15x1-13)]x9 = [81-26x(15-13)]x9 =(81-26x2)x9 = (81-52)x9 = 29x9 = 261.