Question

Câu cuối cùng nha mấy ban  

e) -28 - [ -7 - (11 + 23 ) - 9 ] 

j) - [ 16 - ( -20 ) + ( -30 ) - ( -11 - 37 ) ]

g) -7 - { 14 + [ 25 - ( 16 - 23 ) ] - 11 }

Answer 1

e) -28-[-7-(11+23)-9]

=-28-(-7-11-23-9)

=-28+7+11+23+9=80

Answer 2

j) -[16-(-20)+(-30)-(-11-37)]

=-(16+20-30+11+37)=-16-20+30-11-37=-22

Answer 3

Answer 4

g) -7-{14+[25-(16-23)]-11}

=-7-[14+(25-16+23-11)]

=-7-(14+25-16+23-11)

=-7-14-25+16-23+11=-42

Answer 5

Answer 6

e) Ta có: -28 - [ -7 - ( 11 + 23 ) - 9 ] = -28 + 7 + 11 - 23 + 9

= -21 + 11 - 23 + 9

= -10 - 23 + 9

= -33 + 9

= - 24

j) Ta có: - [ 16 - ( -20 ) + ( -30 ) - ( -11 - 37 ) ] = -16 - 20 + 30 - 11 - 37

= -36 + 30 - 11 - 37

= -6 - 11 - 37

= -17 - 37

= -54

g) Ta có: -7 - { 14 + [ 25 - ( 16 - 23 ) ] - 11 } = -7 - 14 - 25 + 16 - 23 + 11

= -21 - 25 + 16 - 23 + 11

= -46 + 16 - 23 + 11

= -30 - 23 + 11

= -53 + 11

= - 42

Chuk bn hok tốt !