= 525 - 295 + 155 - [ -145 + 1155 + 525 ]

= 525 - 295 + 155 + 145 - 1155 - 525

= ( 525 - 525) + ( 1155 - 115) + ( 295 - 145)

= 0 + 1000 + 150

=1150

xem lại nha! mik ko giỏi mấy vụ này đâu

phá ngoặc ra đi

=0+1000+150=1150

ĐS 1150 

a) = \(\left[\left(360+240\right)-\left(295+259\right)\right]:2\)

    = \(\left(600-554\right):2\)

    = 46 : 2

    = 23

b) = \(\left[\left(45+55\right)\times9\right]:3\)

    = \(\left(100\times9\right):3\)

    = 900 : 3

    = 300

léo biết 

593

Tik nha

mẤY bồ

593

Tik nha mấy bồ

593

tich mik nha may ban

A=\(\frac{3}{5}\): \(\frac{4}{5}\) + \(\frac{3}{7}\):\(\frac{4}{7}\)+ \(\frac{3}{13}\): \(\frac{4}{13}\)+\(\frac{3}{295}\): \(\frac{4}{295}\)

A= \(\frac{3}{4}\)+ 3/4 + 3/4 + 3/4

A=3/4 . 4 = 3

Ta có: \(\frac{3}{5}+\frac{3}{7}+\frac{3}{13}+\frac{3}{295}=3.\left(1+\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)\)

\(\frac{4}{5}+\frac{4}{7}+\frac{4}{13}+\frac{4}{295}=4.\left(1+\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)\)

\(\Rightarrow\frac{\frac{3}{5}+\frac{3}{7}+\frac{3}{13}+\frac{3}{295}}{\frac{4}{5}+\frac{4}{7}+\frac{4}{13}+\frac{4}{295}}=\frac{3.\left(1+\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)}{4.\left(1+\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)}=\frac{3}{4}\)

\(A=\frac{\frac{3}{5}+\frac{3}{7}+\frac{3}{13}+\frac{3}{295}}{\frac{4}{5}+\frac{4}{7}+\frac{4}{13}+\frac{4}{295}}=\frac{3\left(\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)}{4\left(\frac{1}{5}+\frac{1}{7}+\frac{1}{13}+\frac{1}{295}\right)}=\frac{3}{4}\)

trả lời 

=259 

chúc bn 

hc tốt

100:4+5-10-5+50+46+4-120+240+295-150-55+20-150+100=259

Chúc học tốt!!!!!!!!

trả lời 

=295 

chúc bn 

hc tốt

Vậy 834 . 57 = 47 538

603 . 295 = 177 885