Question

a)[(2²-3)•7+7²]:2³=?
b)[2017⁰+(3²)²⁰:(3¹³)³]³⁰:8²⁰=?
c)5•{5•[5•(5²-3²)-4²]-15²}:19-5²=?​

Answer 1

Răspuns:

a)[(4-3)×7+49]:8

(1×7+49):8

56:8=7

b)(1+3²⁰:3³⁹)³⁰:8²⁰=

(1+3)³⁰:8²⁰

4³⁰:8²⁰

(2²)³⁰:(2³)²⁰=2⁶⁰:2⁶⁰=1

c)5+{5×[5×(25-9)-16]-225}:19-25

5×[5×(5×16-16)-225]:19-25

5×(5×64-225):19-25

5×95:19-25

475:19-25

25-25=0