1+2+3+4+5+6+7+8+9=45 nha

~HT~

k cho mình nha

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45 bn nhé

1+2+3+4+5+6+7+8+9=45

a) ( x - 3) : 25 = 28

x - 3 = 28 x 25

x - 3 = 700

x = 700 + 3 = 703

b) ( 8 - x : 2 ) : 4 = 2

8 - x : 2 = 2 x 4

8 - x : 2 = 8

x : 2 = 8 - 8 = 0

=> x = 0

Bài làm :

\(a,\left(x-2\right):25=28\)

\(x-2=28.25\)

\(x-2=700\)

\(x=700+2\)

\(x=702\)

Vậy x = 702 .

\(b,\left(8-x:2\right):4=2\)

\(8-x:2=8\)

\(x:2=8-8\)

\(x:2=0\)

\(x=0\)

Vậy x = 0.

Học tốt

( x - 3 ) : 25 = 28

x - 3 = 28 . 25

x - 3 = 700

x = 700 + 3

x = 703

Vậy x = 703

( 8 - x : 2 ) : 4 = 2

8 - x : 2  = 2 . 4

8 - x : 2  = 8

x : 2 = 8 - 8

x : 2 = 0

x = 0 x 2

x = 0

Vậy x = 0

55 nhé

bằng 55 nhe

~ HT ~

(1+9)+(2+8)+(3+7)+(4+6)+5+10

10+10+10+!0+5+10=55

các bạn ơi giúp mình với ạ

bang 67 

1: (\(\dfrac{2}{3}\) - \(\dfrac{3}{4}\))²

= 1: (- \(\dfrac{1}{12}\))²

= 1 : \(\dfrac{1}{144}\)

= 144

1/2+1/3=5/6 nhé

mọi người nhớ ủng hộ mik nhé

thank you

1/2+1/3=3/6+2/6=5/6

\(\frac{1}{2}\)+\(\frac{1}{3}\)=\(\frac{3}{6}\)+\(\frac{2}{6}\)=\(\frac{5}{6}\)k mk nha

X = \(\dfrac{3}{16}\)

\(X\) = 3 phần 16

X = 

cà khịa time x=+
 

cân cặc

=2100190

\(\dfrac{1}{2}\) \(\times\) \(\dfrac{6}{7}\) + \(\dfrac{5}{7\times5}\) - \(\dfrac{8}{9}\)

= \(\dfrac{3}{7}\) + \(\dfrac{1}{7}\) - \(\dfrac{8}{9}\)

= \(\dfrac{4}{7}\) - \(\dfrac{8}{9}\)

= - \(\dfrac{20}{63}\)

\(\dfrac{20}{63}\)

= 20/63 nha bn