a)-169+215-(-169)+115

=-169-(-169)+(215+115)

=0+330

=330

a)-169+215-(-169)+115

= -169 - (-169 ) + ( 215 + 115 )

= 0 + 330

=  330

\(330\)

\(\left(169-4^2\right).\left(169-5^2\right)...\left(169-13^2\right)\)

\(=\left(169-4^2\right).\left(169-5^2\right)...\left(169-169\right)\)

\(=0\)

= (-169)+225-169-225+196

= (-169)+225-169+(-225)+196

= (-169)+225-(-169)+225+196

= [(-169)+225-(-169)+225]

= 0+196

=196

29.31.169.\(13^2=25676339=13^4.29.31\)

\(a,=80+13^2:13^2=80+1=81=3^4\\ b,=25\cdot4-2^5:2^4=100-2=98=2\cdot7^2\\ c,=111+16^2:16^2=111+1=112=2^4\cdot7\\ d,=175-\left(75-45\right)=175-30=145=5\cdot29\)

a )

20.4 + 169 : 13²

= 80+169 : 169

=80 + 1

=81

=3⁴

b)5² . 4 -32 :3⁴ 

= 25 . 4 - 32 : 81

= 100 - \(\dfrac{32}{81}\)

= \(\dfrac{8068}{81}\)

mn bày e gấp vs ạ,e đag cần gấp lắm

ôi bạn ơi

mik ko bt

a. 800-{50.[18-2³) : 2 + 3²]}

= 800 - {50.[18 - 8) : 2 + 9]}

= 800 - {50.[10 : 2 + 9]}

= 800 - [50.(5 +9)]

= 800 - (50 . 14)

= 700

= 100

b. 28.(231+69) + 72.(131+169)

= 28.300 + 72.300

= 300 . (28 + 72)

= 300 . 100

= 30000

\(B=81.\left[\frac{3\left(12-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}\right)}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}:\frac{5\left(1+\frac{1}{13}+\frac{1}{169}+\frac{1}{91}\right)}{6\left(1+\frac{1}{13}+\frac{1}{169}+\frac{1}{91}\right)}\right].\frac{79.2.1001001}{79.9.1001001}\)

\(B=81.\left[3.\frac{6}{5}\right].\frac{2}{9}\)

\(B=\frac{9.9.3.6.2}{5.9}\)

\(B=\frac{9.3.6.2}{5}\)

\(B=\frac{324}{5}\)

Tick cho minh nha Quang Hai Duong tick minh may man ca nam

Kakashi_kun linh tinh vừa thôi

Bài thế kia mà bảo là toán lớp 6

a) \(\dfrac{3}{10}\)

b) \(\dfrac{9}{28}\)

c) \(\dfrac{88}{195}\)