(-57)+(-159)+47+169
-2021+(-569)+(-201)+496+301
[(-581)+5294]+[(-5294]+581]
921+[97+(-921)+(-47)]
(-57)+(-159)+47+169 -2021+(-569)+(-201)+496+301 [(-581)+5294]+[(-5294]+581] 921+[97+(-921)+(-47)]
By Sadie
By Sadie
(-57)+(-159)+47+169
-2021+(-569)+(-201)+496+301
[(-581)+5294]+[(-5294]+581]
921+[97+(-921)+(-47)]
Đáp án:
`a)0`
`b)-1994`
`c)0`
`d)50`
Giải thích các bước giải:
`a)(-57)+(-159)+47+169`
`=(-57+47)+(-159+169)`
`=-10+10`
`=0`
`b)-2021+(-569)+(-201)+496+301`
`=-2021+(-569)+496+(-201+301)`
`=-2021+(-569)+496+100`
`=-2021+(-569)+(496+100)`
`=-2021+(-569)+596`
`=-2021+(-569+596)`
`=-2021+27`
`=-1994`
`c)[(-581)+5294]+[(-5294)+581]`
`=(-581)+5294+(-5294)+581`
`=(-581)+581+5294+(-5294)`
`=(-581+581)+(5294-5294)`
`=0+0`
`=0`
`d)921+[97+(-921)+(-47)]`
`=921+97+(-921)+(-47)`
`=921+(-921)+97+(-47)`
`=(921-921)+(97-47)`
`=0+50`
`=50`
`(-57)+(-159)+47+169`
` = [(-57) + 47 ] + [(-159) + 169 ]`
` = -10 + 10`
` = 0`
` – – – – – – -`
`-2021+(-569)+(-201)+496+301`
` = -2590 + (-201)+496+301`
` = – 2791 +496+301`
` = -2295 + 301`
` = -1994`
`———-`
`[(-581)+5294]+[(-5294]+581]`
` = (-581)+5294 + (-5294]+581`
` = [(-581) + 581] + [(-5294) + 5294]`
` = 0`
` – – – – – – – -`
`921+[97+(-921)+(-47)]`
` = 921 + 97+(-921)+(-47)`
`=[921 + (-921)] + [97 + (-47)]`
` =0 + 50`
`= 50`