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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,
\(\left(13-135+49\right)-\left(13+49\right)\)
\(=13-135+49-13-49\)
= \(\left(13-13\right)+\left(49-49\right)-135\)
= \(-135\)
13-135+49-13+(-49)
=(13-13)-135[ 49+(-49)]
=0-135+0
=135
hhọc tốt
\(13-135+49-13+\left(-49\right)\)
\(=\left(13-13\right)+\left[\left(-49\right)+49\right]-135\)
\(=0+0-135=-135\)
( 13 - 135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 - 13 - 49
= ( 13 -13 ) + ( 49 - 49 ) - 135
= 0 + 0 - 135
= -135
( 13 - 135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 - 13 - 49
= ( 13 -13 ) + ( 49 - 49 ) - 135
= 0 + 0 - 135
= -135
(13-135+49)-(13+49)
= 13-135+49-13-49
= 13-13+49-49-135
= 0+0-135
= -135
\(a,\left(13+49\right)-\left(13-135\right)\)
= \(13+49-13+135\)
= \(13-13+49+135\)
= \(184\)
\(b,\left(18+29\right)+\left(158-18-29\right)\)
= \(18+29+158-18-29\)
= \(158\)
\(c,4.5^2-3.\left(24-9\right)\)
= \(4.25-\left(72-27\right)\)
= \(100.-45\)
= \(55\)
\(d,\left[93-\left(20-7\right)\right]:16\)
= \(\frac{93-20+7}{16}\)
= \(\frac{80}{16}\)
= \(5\)
(18+29)+(158-18-19)
=47+121
=168
(13-135+49)-(13+49)
= -73-62
=-135
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(18+29) +( 158 -18-29)
= 18 + 29 + 158 - 18 - 29
= 18 - 18 + 29 - 29 + 158
= 0 + 0 + 158
= 158
(13-135+49)-(13+49)
= 13 - 135 + 49 - 13 - 49
= 13 - 13 + 49 - 49 - 135
= 0 + 0 -135
= -135
( 18 + 29 ) + ( 158 - 18 - 29 )
= 18 + 29 + 158 - 18 - 29
= ( 18 - 18 ) + ( 29 - 29 ) + 158
= 0 + 0 + 158
= 158
( 13 - 135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 - 13 - 49
= ( 13 - 13 ) + ( 49 - 49 ) - 135
= 0 + 0 - 135
= -135
( 13 − 135 + 49 ) − ( 13 + 49 ) = 13 − 135 + 49 − 13 − 49 = ( 13 − 13 ) + ( 49 − 49 ) − 135 = 0 + 0 − 135 = − 135.
( 13 + 49) - ( 13 - 135 + 49)
= 13 + 49 - 13 + 135 - 49
= ( 13 - 13) + ( 49 - 49) + 135
= 0 + 0 + 135
= 135
135