B1

a) 17 b) 6 c) 112 d)9687

B2

100-x=33

x=100-33

x= 67

Ko bít

22222222222222222

Cgcr

bạn làm đúng rồi đấy

C1: \(\left(\frac{3}{5}+\frac{4}{9}\right)\cdot\frac{3}{8}=\frac{47}{45}\cdot\frac{3}{8}=\frac{141}{360}=\frac{47}{120}\)

C2: \(\left(\frac{3}{5}+\frac{4}{9}\right)\cdot\frac{3}{8}=\frac{3}{5}\cdot\frac{3}{8}+\frac{4}{9}\cdot\frac{3}{8}=\frac{9}{40}+\frac{12}{72}=\frac{47}{120}\)

C1: ( \(\frac{3}{5}+\frac{4}{9}\) ) * \(\frac{3}{8}\) 

= \(\frac{47}{45}\) * \(\frac{3}{8}\) = \(\frac{47}{120}\) 

C2: Đề

= 3/5 * 3/8 + 4/9 * 3/8

= 9/40 + 1/6

= 47/120

4+8+7+9+5+2+1+3*0=36

4 + 8+7+9+5+2 +1 +0

Trả lời

=1 Vì rút gọn

Học tốt !

ko rút gọn :(

Trả lời :

a)\(\frac{8}{3}+\frac{8}{9}\)

\(=\frac{72}{27}+\frac{24}{27}\)

\(=\frac{96}{27}\)

\(=\frac{32}{9}\)

b)\(988888+2000=9908888\)

Hok_tốt

#Thiên_Hy

\(\frac{8}{3}+\frac{8}{9}=\frac{32}{9}\)

988888 + 2000 =990888

.

48 : 8 = 6

6

280

280✔

[(1+9)+(2+8)+(3+7)+(4+6)+5]x2

=(10+10+10+10+5)x2

=45x2

=90

50x2+2x10

=2x(50+10)

=2x60

=120

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

x + 2617 x 5 = 22219 
x + 2617 = 22219 : 5
x + 2617 = 4443,8
x = 4443,8 - 2617
x = 1826,8

( x - 9587 ) : 8 = 1415
( x - 9587 ) = 1415 x 8
( x - 9587 ) = 11320
x = 11320 + 9587
x = 20907

x + 2617x 5 = 22219 

x + 2617 = 22219 : 5

x + 2617 = 4443,8

x = 4443,8 - 2617

x = 1826,8

( x - 9587) : 8 =  1415

( x - 9587 ) = 1415 x 8

( x - 9587 ) = 11320

x = 11320 + 9587

x = 20907

Chúc bạn học tốt!