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(871 - 28) + (- 2004 + 28 - 871)
= 871 - 28 - 2004 + 28 - 871
= (871 - 871) + (28-28) - 2004
= 0 + 0 - 2004
= - 2004
\(2016-\left(-21+46+2016\right)\)
\(=2016-\left(25+2016\right)\)
\(=\left(2016-2016\right)-25\)
\(=0-25\)
\(=-25\)
\(\left(817-28\right)+\left(-2004+28-871\right)\)
\(=789+\left(-1976-871\right)\)
\(=789+-2847\)
\(=-2058\)
- 2016 - ( - 21 + 46 + 2016 ) ( 817 - 28 ) + ( - 2004 + 28 - 871 )
= 2016 - ( - 21 ) - 46 - 2016 = 817 - 28 + ( - 2004 ) + 28 - 871
= ( 2016 - 2016 ) - ( -21 - 46 ) = ( 817 - 817 ) + ( 28 - 28 ) + ( - 2004 )
= 0 - ( - 67 ) = 0 + 0 + ( - 2004 )
= 67 = ( - 2004 )
nhớ k cho mik nha
(871-28)+(-2004+28-871)
=[871+(-871)]+[28+(-28)]+(-2004)
=0+0+(-2004)
=-2004
nhe
(871-28)+(-2004+28-871)
= 871-28+(-2004)+28-871
= 871-28 +871-28+(-2004)
= 0+0+(-2004)
= -2004
=871-28-2004+28-871
=871-871-28+28-2004
=0-28+28-2004=-28+28-2004=0-2004=-2004
(871-28)+ (-2004+28-871)
=871- 28 -2004 +28 -871
=(871-871)+(-28+28)-2004
=0+0-2004
=-2004
a) (871 - 28 ) + ( 229 - 72 )
= 871 - 28 + 229 - 72
= (871 + 229) - (28 + 72)
= 1100 + 100 = 1200
b) ( 689 - 31 ) - ( 269 - 111 )
= 689 - 31 - 269 + 111
= (689 + 111) - (31 + 269)
= 800 - 300= 500
c) 215 + ( - 38) - ( - 58) + 90 - 85
= 215 - 38 + 58 + 90 - 85
= (215 - 85) + (58 - 38) + 90
= 130 + 20 + 90 = 240
d) 31 - [ 26 - ( 209 + 35 ) ]
= 31 - 26 + 209 + 35
= (31 + 209) + (35 - 26)
= 240 + 9 = 249
e) ( 1267 - 196 ) - ( 267 + 304 )
= 1267 - 196 - 67 - 304
= (1267 - 67) - (196 + 304)
= 1200 - 500 = 700
f) ( 3965 - 2378 ) - ( 437 - 1378 ) - 528
= 3965 - 2378 - 437 + 1378 - 528
= 3965 - (2378 - 1378) - (437 + 528)
= 3965 - 1000 - 965 = 3000 - 1000 = 2000
Chúc em học tốt!!!
125.(28+72)-25.(3^2.4+64)
= 125.100-25.100
=(125-25).100
= 100.100
=10000
\(125.\left(28+72\right)-25.\left(3^2.4+64\right)\)
\(=125.100-25.\left(9.4+64\right)\)
\(=125.100-25.\left(36+64\right)\)
\(=125.100-25.100\)
\(=100.\left(125-25\right)\)
\(=100.100\)
\(=10000\)
= 843 + 53=896
Chúc em học tốt
\(\left(871-28\right)+\left(125-72\right)\)
\(=843+53\)
\(=896\)