4/9 + 1/3 =
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( 13 + 49) - ( 13 - 135 + 49)
= 13 + 49 - 13 + 135 - 49
= ( 13 - 13) + ( 49 - 49) + 135
= 0 + 0 + 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
(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
(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
\(=13-135+49-13-49\)
\(=\left(13-13\right)+\left(49-49\right)-135\)
\(=0+0-135\)
\(=-135\)
Bài làm
( 13 - 135 + 49 ) - ( 13 + 49 )
= 13 - 135 + 49 - 13 - 49
= ( 13 - 13 ) + ( 49 - 49 ) - 135
= 0 + 0 - 135
= -135
# Học tốt #
`#3107.101107`
\(\dfrac{4}{9}+\dfrac{1}{3}\\ =\dfrac{4}{9}+\dfrac{3}{9}\\ =\dfrac{7}{9}\)
\(\dfrac{4}{9}+\dfrac{1}{3}\)
\(=\dfrac{4}{9}+\dfrac{3}{9}\)
\(=\dfrac{4+3}{9}\)
\(=\dfrac{7}{9}\)