Question

(9. Calculati :
a) (16× 12¹⁰ - 4×12¹⁰): 12¹¹
c) 10³×85-10³× 61 - 3 000;
b) 15² - (14: 15+15): 15²
d) 5¹¹– (6×5¹⁰ – 2×5¹⁰)
​

Answer 1

Răspuns:

a) ( 16x12¹⁰-4x12¹⁰):12¹¹ =

=( 2⁴x12¹⁰-2²x12¹⁰):12¹¹ =

= 2⁴/12-2²/12

=2⁴/2²*3 -2²/2²*3=

=2²/3-1/3=4/3-1/3=3/3=1

b)15² -(14x15+15):15² =

=15² -(15(14+1):15² =

=15² -(15*15):15² =

=15² -1 =

=225-1=224

c)10³x85-10³x61-3000 =

=10³x85-10³x61-3000 =

=10³(85-61-3)=

=10³(85-61-3)=

=10³ * 21 =21000

d)5¹¹- (6x5¹⁰-2x5¹⁰) =

= 5¹¹- 5¹⁰(6-2) =

= 5¹¹- 5¹⁰*4 =

=5¹⁰(5-4)=5¹⁰

Explicație pas cu pas: