a: 3*5^2-16:2^2

=3*25-16:4

=75-4=71

b: =2^3(17-14)

=8*3

=24

c: =15(141+59)

=15*200

=3000

d: =17(85+15)-200

=1700-200

=1500

f: =3+2^5

=3+32

=35

g: =42(39-37):42

=39-37

=2

(39.42 – 37.42) : 42 = (39 – 37).42 : 42 = 2.42 : 42 = 2

a)(39.42-37.42):42

=42.(39-37):42

=42.2:42

=2.(42:42)

=2.1

=2

thanks,phan nguyen hai yen

( 39 . 42 - 37 . 42 ) : 42 

= 42 . ( 39 - 37 ) : 42

= 42 .         2      : 42 

= 2 . ( 42 : 42 ) 

= 2 .        1

= 2

bằng 2 nhek bạn

\(\left(39\times42-37\times42\right):42=42\times\left(39-37\right)\div42=42\times2\div42=2\)

C1.   ( 39.42-37.42):42

     = (39-37) . 42 : 42

     =   2.1

     =  2

C2,   (39.42-37.42):42

     = (1638 - 1554) : 42

     =     84  :  42

     =         2

   Ai thay hinh dep thi k nha ^_^ @ hihi

A=4480

B=2

C=30

a) 14.95+10.25.7+20.70

=(14.5).(95:5)+(10.7).25+20.70

=70.19+70.25+20.70

=70.(19+25+20)

=70.64

=4480

b)(39.42-37.42):42

=42.(39-37):42

=42.2:42

=2.(42:42)

=2.1

=2

36:32 + 23.22 = 36-2 + 23+2 = 34 + 25 = 81 + 32 = 113

a) 3⁶:3²+2³.2²

= 3^6-2+2³⁺²

= 3⁴+2⁵= 81 + 32 = 113 (nhấc điện thoại lên nào bạn ơi)

b) (39.42-37.42):42

= [(39 - 37).42)] : 42

= (2.42):42

= 84 : 42 = 2

a, 3⁶:3³+2³.2²

=3^6-2+2³⁺²

=3⁴+2⁵

=81+32

=113

a) 3⁶:3²+2³.2²=3^6-2+2³⁺²=3⁴+2⁵=81+32=113

b)(39.42-37.42):42=[(39-37).42]:42=(2.42):42=2

a, \(3^6:3^3+2^3.2^2\\ =3^3+2^5=27+32=59\)

b, \(\left(39.42-37.42\right):42\\ =42.\left(39-37\right):42\\ =39-37=2\)

a, 3⁶ : 3² + 2³ . 2² = 3⁴ + 2⁵ = 81 + 32 = 113

b, ( 39.42 - 37.42 ) : 42

= 42. ( 39 - 37 ) : 42

= 42 . 2 : 42

= 84 : 42

= 2