Question

calculat a) (2+2²+2³)×(10¹-3)= b) [(9²-2⁴×5):1+5⁹:(5²)⁴]×2²​

Answer 1

a) (2+2²+2³)•(10¹-3)=98

=(2+4+8)•(10-3)

=14•7

=98

b)[(9²-2⁴•5):1+5⁹:(5²)⁴]•2=12

=[(81-16•5):1+5⁹:5⁸]•2

=[(81-80):1+5⁹-⁸]•2

=(1:1+5¹)•2

=(1+5)•2

=6•2

=12

Cu plăcere!