= 3.25 - 5 . [4³ - (27 - 25) : 1]

= 75 - 5 . [64 - 2]

= 75 - 5 . 62

= 75 - 310

= - 245

A , sr nha

Kq: -235 bn ak

a) \(\dfrac{-4}{6}\)

b) \(\dfrac{1}{3}\)-\(\dfrac{20}{60}\)

= 0 

c) \(-20^2\)+(\(-50^3\))

= -400 + (-125000)

=-125400

d) \(\dfrac{-2}{7}\)+\(\dfrac{15}{35}\)

= \(\dfrac{-10}{35}\)+\(\dfrac{15}{35}\)

= \(\dfrac{5}{35}\)=\(\dfrac{1}{7}\)

Nhớ tick cho mk nha

a) \(\dfrac{-5}{6}+\dfrac{1}{6}=\dfrac{-5+1}{6}=\dfrac{-4}{6}=\dfrac{-2}{3}\)

b) \(\dfrac{1}{3}-\dfrac{5}{4}\cdot\dfrac{4}{15}=\dfrac{1}{3}-\dfrac{1}{3}=0\)

cho xin đáp án chi tiết điiiii

câu hỏi là gì

mấy bài này dễ cậu tữ làm

bít ồi mà tớ gửi cho thủy làm thủy bị mất đề

\(a,5\frac{1}{4}+3,25-50\%+y=15,25\)

\(\Leftrightarrow5,25+3,25-\frac{50}{100}+y=15,25\)

\(\Leftrightarrow5,25+3,25-0,5+y=15,25\)

\(\Leftrightarrow8+y=15,25\)

\(\Leftrightarrow y=15,25-8=7,25\)

\(b,(y-3):2=2010\)

\(\Leftrightarrow y-3=4020\)

\(\Leftrightarrow y=4023\)

\(c,\frac{7+y}{33}=\frac{9}{11}\)

\(\Leftrightarrow7+y=\frac{9}{11}\cdot33\)

\(\Leftrightarrow7+y=\frac{9}{1}\cdot3\)

\(\Leftrightarrow7+y=27\Leftrightarrow y=20\)

a,

11+6+(-11)+(-3)

= [11+(-11)]+(6+(-3)]

=0+3

=3

b,

25.7.(-5).(-4).2

=[25.(-4)].[-5.(-2)].7

=-100.10.7

-7000

c,

3.25-7.(-25)

=3.25+7.25

=(3+7).25

=10.250

=250

( 29,38 - 3,25 x 5 +36,36 : 3 ) : 6,25

= 25,25 : 6,25

=  4,04