Câu 1: B

Câu 2: C

1, B 2,C

Câu 2:

a: x-158=32

=>x=158+32

=>x=190

b: \(x\cdot24=264\)

=>\(x=\dfrac{264}{24}\)

=>x=11

c: \(6x+9=3^7:3^4\)

=>\(6x+9=3^3\)

=>6x+9=27

=>6x=18

=>x=18/6=3

Câu 1:

a: \(86\cdot19+14\cdot19\)

\(=19\left(86+14\right)\)

\(=19\cdot100=1900\)

b: \(4\cdot\left(-5\right)^2-104\cdot\left(-5\right)^2\)

\(=4\cdot25-104\cdot25\)

\(=25\left(4-104\right)=-100\cdot25=-2500\)

c: \(7\cdot\left(-2\right)\cdot8\left(-5\right)\)

\(=7\cdot2\cdot8\cdot5\)

\(=56\cdot10=560\)

d: \(59-\left[59+\left(-76\right)\right]\)

\(=59-59+76\)

=76

Câu 1:

a: \(19\cdot64+36\cdot19\)

\(=19\left(64+36\right)=19\cdot100=1900\)

b: \(150-\left\lbrack10^2-\left(14-11\right)^2\right\rbrack\cdot2007^0\)

\(=150-\left\lbrack100-3^2\right\rbrack\cdot1\)

=150-(100-9)

=150-100+9

=50+9

=59

d: \(59-\left\lbrack90-\left(17-8\right)^2\right\rbrack\cdot1^{4514}\)

\(=59-90+9^2\)

=59+81-90

=50

e: \(7^2-36:3\)

=49-12

=37

=273

mk k pạn rùi, k mk đi pạn

SỐ ĐÓ LÀ

273

AI K MÌNH MÌNH 

K LẠI CHO

NHA CÁC BN

\(a,=600+72+18=690\\ b,=25+5-20=10\\ c,=45-28+83=100\\ d,=25+36+1=62\\ e,=151-8+3=146\)

a)600+72+18=690

b)25+5-20=10

c)45-28+83=100

d)25+36+1=62

e)151-8+3=146