a, (18+29) +(158-18-29)
= 18+29+158-18-29
= (18-18) +(29-29)+ 158
= 158
b, (13-135+49)- (13+49)
= 13-135+49-13-49
= (13-13) +(49-49) -135
= 135
a, \(\left(18+29\right)+\left(158-18-29\right)\)
\(=18+29+158-18-29\)
\(=\left(18-18\right)+\left(29-29\right)+158\)
\(=158\)
b,
\(\left(13-135+49\right)-\left(13+49\right)\)
\(=13-135+49-13-49\)
= \(\left(13-13\right)+\left(49-49\right)-135\)
= \(-135\)
a) (18+29)+(158-18-29)
=18-29+185-18-29
=(18-18)+(18-18)-158
=0+0-158
=-158
b)(13-135+49)-(13+49)
=13-135+49-13-49
=(13-13)+(49-49)-153
=0+0-153
=-153
a) (18+29)+(158-18-29)
=18+29+158-18-29
=18-18+29-29+158
=0+0+158
=158
b) (13-135+49)-(13+49)
=13-135+49-13-49
=13-13+49-49-135
=0+0-135
=-135
a) (18 + 29) + (158 -18 - 29 )
= 18 + 29 + 158 - 18 - 29
= ( 18 - 18 ) + ( 29 - 29 ) + 158
= 0 + 0 + 158 + 158
a) ( 18 + 29 ) + ( 158 -18 - 29 )
= 18 + 29 + 158 -18 -29
= ( 18- 18 ) + ( 29 -29 ) + 158
= 0 + 0 + 158 = 158
b) ( 13 -135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 -13 - 49
= ( 13 -13 ) + ( 49 - 49 ) - 135
= 0 + 0 -135 = -135
a) (18 +29 ) + ( 158 – 18 – 29 ) = 18 + 29 + 158 – 18 – 29
= ( 18 – 18 ) + ( 29 – 29 ) + 158 = 0 + 0 + 158 = 158
b) ( 13 – 135 + 49 ) – ( 13 +49) = 13 – 135 + 49 – 13 – 49
= ( 13 – 13 ) + ( 49 – 49 ) – 135 = 0 + 0 – 135 = -135
a ) ( 18 + 29 ) + ( 158 - 18 - 29 )
= 18 + 29 + 158 - 18 - 29
= 18 - 18 + 29 - 29 + 158
= 158
b) ( 13 - 135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 - 13 + 49
= 13 - 13 + 49 - 49 + 135
= 135
a) (18 +29 ) + ( 158 – 18 – 29 )
= 18 + 29 + 158 – 18 – 29
= ( 18 – 18 ) + ( 29 – 29 ) + 158
= 0 + 0 + 158 = 158
b) ( 13 – 135 + 49 ) – ( 13 +49)
= 13 – 135 + 49 – 13 – 49
= ( 13 – 13 ) + ( 49 – 49 ) – 135
= 0 + 0 – 135 = -135
a, \(\left(18+29\right)+\left(158-18-29\right)\)
\(=18+29+158-18-29\)
\(=\left(18-18\right)+\left(29-29\right)+158\)
\(=0+0+158\)
\(=158\)
b,\(\left(13-135+49\right)-\left(13+49\right)\)
\(=13-135+49-13-49\)
\(=\left(13-13\right)+\left(49-49\right)+135\)
\(=0+0+135\)
\(=135\)
