a, ( – 23 ) + 15 + 18 + 23
b, 815 + [ 95 + ( – 815 ) + ( – 45 ) ]
c, ( 1267 – 196 ) – ( 267 + 304 )
d, 1152 – ( 374 + 1152 ) + ( – 65 + 374 )
Giúp tớ vs ạ :)) Tớ đang cần gấp ạ :))
a, ( – 23 ) + 15 + 18 + 23
b, 815 + [ 95 + ( – 815 ) + ( – 45 ) ]
c, ( 1267 – 196 ) – ( 267 + 304 )
d, 1152 – ( 374 + 1152 ) + ( – 65 + 374 )
Giúp tớ vs ạ :)) Tớ đang cần gấp ạ :))
a) ( – 23 ) + 15 +18 + 23 = [( – 23 ) + 23 ] + 15 + 18
= 0 + 33
= 33
b) 815 + [ 95 + ( – 815 ) + ( – 45 ) ] = [ ( – 815 ) + 815 ] + [ ( – 45 ) + 95 ]
= 0 + 50
= 50
c) ( 1267 – 196 ) – ( 267 + 304 ) = ( 1267 – 267 ) – ( 196 + 304
= 1000 – 500
= 500
d) 1152 – ( 374 + 1152 ) + ( – 65 + 374 ) = ( 374 – 374 ) + ( 1152 – 1152 ) + ( -65 )
= 0 + 0 + ( – 65 )
= ( – 65 )
@Thản
Chúc bạn học tốt !
Cho mik câu trả lời hay nhất nha >.<
a, ( – 23 ) + 15 + 18 + 23
=(-23) + 23+ 15+ 18
= 0+15+18
= 33
b, 815 + [ 95 + ( – 815 ) + ( – 45 ) ]
=815 + 95 + ( – 815 ) + ( – 45 )
= 815+(-815) + 95 + (-45)
= 0 +95 +(-45)
= 50
c, ( 1267 – 196 ) – ( 267 + 304 )
= 1267 – 196 – 267 – 304
= 1267 – 267 – (196 + 304)
= 1000 – 500
= 500
d, 1152 – ( 374 + 1152 ) + ( – 65 + 374 )
= 1152 – 374 – 1152 + ( – 65 + 374 )
= 1152 – 1152 – 374 + ( -65 + 374 )
= 0 – 374 + (-65) + 374
= -374 + 374 + (-65)
= 0 + (-65)
= -65
Chúc bạn học tốt :)))))))