120:2+45x24-46

=60+1080-46

=1094

= 1094 nha

120 : 2 + 45 x 24 - 46

= 60 + 1080 - 46

= 1140 - 46

= 1094

720-300sao=400 được.

a, 47 -[( 45.2 mũ 4- 5 mũ 2.12):14]

=47-[(45.16-25.12) :14]

=47-[(720 -300):14]

=47-[ 420:14]

=47-30= 17

Xong rồi nè! Chúc bạn thi tốt nha....!

sai roi

T= -14 . 47 + 14 . (-52) + (-14)

T= -14 . 47 + (-14) . 52 + (-14) . 1

T= (-14) . (47+52+1)

T= (-14) . 100

T= -1400

Tick cho mình nha

\(\frac{31}{47}.\frac{14}{29}+\frac{31}{47}.\frac{15}{29}+\frac{16}{47}=\frac{31}{47}(\frac{14}{29}+\frac{15}{29})+\frac{16}{47}=\frac{31}{47}+\frac{16}{47}\)

=1

a: \(\left(36-16\right)\cdot\left(-15\right)+16\cdot\left(-14-6\right)\)

\(=-15\cdot20+16\cdot\left(-20\right)=-20\cdot\left(-15+16\right)=-20\)

b: \(\left(-47\right)\cdot\left(-69\right)-\left(-31\right)\cdot47\)

\(=47\cdot69+31\cdot47\)

\(=47\cdot100=4700\)

c: \(38\cdot\left(-41\right)+59\cdot\left(-38\right)\)

\(=38\left(-41-59\right)\)

\(=-100\cdot38=-3800\)

đặt \(\sqrt[3]{14+2\sqrt{47}}=a\) , \(\sqrt[3]{14-2\sqrt{47}}=b\) rồi làm bt

47 – [(45.2⁴ – 5².12):14]

= 47 -[45.16 - 25.12):14]

= 47 - [720 - 300):14]

= 47 - [420:14]

= 47 - 30

= 17

47 - ( 45 . 2⁴ - 5² . 12 ) :14

= 47 - ( 45 . 16 - 25 . 12 ) :14

= 47 - ( 720 - 300 ) :14

= 47 - 420 : 14

= 47 - 30

= 17

-x+23=14-47

-x+23=-33

-x=-33-23

-x=-56

k nhe dung lun

-x+23=14-47

=> -x+23= -33

=> -x= -33-23

=> -x= -56

=>x= 56

-x + 23 = 14 - 47

-x + 23 = -33

x + 23 = 33

x         =  33 -23

=>   x = 10