16) M = (-32 + 215) - (-30 + 215)

= -32 + 215 + 30 - 215

= (215 - 215) + (30 - 32)

= 0 - 2 = -2

17) N = -5 + (-37 - 45 + 151) - (-37 + 151)

= -5 - 37 - 45 + 151 + 37 - 151

= (151 - 151) - (5+45) + (37 - 37)

= 0 - 50 + 0 = -50

(-5+-45)+(-37--37)+(151+151)

=-50+0+302

=252

a: Ta có: \(-5+\left(-37\right)-45+151-37+151\)

\(=\left(-5-45\right)-\left(37+37\right)+2\cdot151\)

\(=-50-74+302\)

=178

b: Ta có: \(53-145-359-53+145-259\)

\(=\left(53-53\right)-\left(145-145\right)-\left(359+259\right)\)

\(=-618\)

\(a.\left(35-815\right)-\left(795-65\right)\\ =35-815-795+65\\ =\left(35+65\right)-\left(815+795\right)\\ =100-1610=-1510\)

Bài 2: 

a: Ta có: \(\left(35-815\right)-\left(795-65\right)\)

\(=35-815-795+65\)

\(=100-1600\)

=-1500

b: Ta có: \(5-197-2015-2015\)

\(=-2010-2212\)

=-4222

c: Ta có: \(1259-1409-12+1259+1409\)

\(=2518-12\)

=2506

\(\left(-151\right)+\left(-37\right)+\left(-42\right)+\left(-63\right)+142\)

\(=-151-37-42-63+142\)

\(=\left(-37-63\right)+\left(-151-42+142\right)\)

\(=-100-51\)

\(=-151\)

 \(\left(-151\right)+\left(-37\right)+\left(-42\right)+\left(-63\right)+142\)

\(=-151+\left[\left(-37-63\right)+\left(142-42\right)\right]\)

\(=-151+\left[-100+100\right]\)

\(=-151+0=-151\)

                   Học tốt

( - 151 ) + ( - 37 ) + ( - 42 ) + ( - 63 ) + 142 

= [ ( - 151 ) + ( - 42 ) ] + [ ( - 37 ) + ( - 63 ) + 142  

=  ( - 193 ) + ( - 100 ) + 142 

= - 293 + 142 

= - 151 

a, 45602:(x-37+13)=151

   45602:151=x-37+13

     302=x-37+13

   302-13=x-37

      289=x-37

     289+37=x=326

vậy x=326

b,6885:(135:x)=153

  6885:153=135:x

    45=135:x

    135:45=x=3

vậy x=3

TICK nha!!!

a 2

b 5

a)387+(-224)+(-87)=[387+(-87)]+(-224)=300+(-87)=213

b)(-75)+329+(-25)=[(-75)+(-25)]+329=-100+329=229

e)251+(-114)+(-151)+(-216)=[251+(-151)]+[(-114)+(-216)]=100+(-330)=-230

j)(-137)+77+(-253)+37-47=[(-137)+37]+77+[(-253)-47]=-100+77-300=177-300=-123