a,101.(-163)+38.(-101)+101
b,2021^0 + (-2).[ 353 – (253 + 79 ) ]
c,2021 + ( 193 – 487 ) – ( 293 – 687)
a,101.(-163)+38.(-101)+101 b,2021^0 + (-2).[ 353 – (253 + 79 ) ] c,2021 + ( 193 – 487 ) – ( 293 – 687)
By Melody
By Melody
a,101.(-163)+38.(-101)+101
b,2021^0 + (-2).[ 353 – (253 + 79 ) ]
c,2021 + ( 193 – 487 ) – ( 293 – 687)
Đáp án:
$a)-20200$
$b)-41$
$c)2121$
Giải thích các bước giải:
$c)$ $2021 + ( 193 – 487 ) – ( 293 – 687)$
$=2021+193-487-293+687$
$=2021+(687-487)+(193-293)$
$=2021+200+(-100)$
$=2021+200-100$
$=2121$
$b)2021^o+(-2).[353-(253+79)]$
$ = 1 + ( -2) . [ 353 – 332 ] $
$ = 1 + ( -2 ) . 21 $
$ = 1 + -42 $
$ = -41$
$a)$ $101.(-163)+38.(-101)+101$
$=101.(-163)-101.38+101$
$=101.(-163-38+1)$
$=101.(-200)$
$=-20200$