7 x 9 - 14 / 3 - 17

= ( 7 x 9 ) - ( 14 / 3 ) - 17

= 63 - 14/3 - 17

= 124/3

zzz chúc học giỏi zzz

7 x 9 - 14/3 - 17

= 63 - 14/3 - 17

= 58/1/3 - 17

= 41/1/3

7.9-14=63-14=49

3-17=-14

Trả lời

7.9-14=63-14=49

3-17=-14

Học tốt nha !

a)\(7.9-14\)

\(=63-14\)

\(=49\)

b)\(3-17=-14\)

_Y nguyệt_

\(\frac{-7}{2}\)

tích hộ nha

a,\(\frac{7.9-14}{3-17}=\frac{63-14}{-14}=\frac{49}{-14}=\frac{7}{-2}\)

b,\(\frac{14}{9}\)         c,\(0\)

k mình nha đồng thời kb hihi

\(c,\frac{9}{23}\cdot\frac{5}{8}+\frac{9}{23}\cdot\frac{3}{8}-\frac{9}{23}\)

\(=>\frac{9}{23}\cdot\left(\frac{5}{8}+\frac{3}{8}-1\right)\)

\(=>\frac{9}{23}\cdot0=0\)

a) 5.2² - 18 : 3

= 5.4 - 18 : 9

= 20 - 2

= 18

b) 17 . 85 + 15 . 17 - 120

= 17 . (85 + 15) - 120

= 17 . 100 - 120

= 1700 - 120

= 1580

c) 2³ . 17 - 2³ . 14

= 8 . 17 - 8 . 14

= 8 . (17 - 14)

= 8 . 3

= 24

a) 5 . 2² – 18 : 3² 

= 5.4 – 18 : 9

= 20 – 2

= 18

b) 17 . 85 + 15 . 17 – 120

= 17. (85 + 15) – 120

= 17.100 – 120

= 170 – 120

= 50

c) 2³ . 17 – 2³ . 14

= 2³.(17 - 14)

= 2³.3

= 8.3

= 24

a) 18

b) 50

c) 24

`31/17+(-5/13)+(-8/3)-14/17`

`=(31/17-14/17)-(5/13-8/3)`

`=17/17-(15/39-104/39)`

`=1-(-89/39)`

`=1+89/39`

`=39/39+89/39`

`=128/39`

a: =4+36

=40

b:\(=5\left(3\cdot23-12\right)+4\cdot26\)

\(=5\cdot55+104\)

=275+104

=379

\(a,=4+63=67\\ b,=345+104-60=389\\ c,=151-\dfrac{97}{96}+396=\dfrac{52415}{96}\\ d,=\dfrac{79}{77}-32+575=\dfrac{41890}{77}\\ e,=21+\dfrac{39}{37}+50=\dfrac{2666}{37}\)

a) 25 –[ 50 – (  2 3  . 17 –  2 3  . 14 )]

= 25 – ( 50 –  2 3 . 3 ) = 25 – ( 50 – 24 )

= 25 – 26 = -1

\(1\dfrac{14}{15}-\dfrac{5}{17}-\dfrac{12}{17}-\dfrac{14}{15}\\ =\left(1\dfrac{14}{15}-\dfrac{14}{15}\right)-\left(\dfrac{5}{17}+\dfrac{12}{17}\right)\\ =\left[1+\left(\dfrac{14}{15}-\dfrac{14}{15}\right)\right]-1=1-1=0\)