a) 1125 - (374 + 1125) + (-65 + 374)

= 1125 - 374 - 1125 + (-65) + 374

= (1125 - 1125) + (-374 + 374) + (-65)

= 0 + 0 + (-65)

= -65

b) -23. 63 + 23 . 21 - 58 . 23

= 23 .(-63) + 23 . 21 - 58 . 23

= 23 . [(-63) + 21 - 58]

= 23 . (-100)

= -2300

c) -2003 + (-21 + 75 + 2003)

= -2003 + (-21) + 75 + 2003

= (-2003 + 2003) + (-21) + 75

= 0 + 54

= 54

d) 942 - 2567 + 2563 - 1942

= (942 - 1942) + (-2567 + 2563)

= -1000 + (-4)

= -1004

e) 12 - 12 + 11 + 10 - 9 + 8 - 7 + 5 - 4 + 3 + 2 - 1

= 0 + 11 + 1 + 1 + 1 + 3 + 1

= 18

a) 1125-(374+1125)+(-65+374)

= 1125 - 374 - 1125 - 65 + 374

= (-1125 + 1125)+(-374+374) - 65

= -65

b)-23.65+23.21-58.23

=23.(-65+21-23)
= 23.(-67)= -1541

c)-2003+(-21+75+2003)

= -2003 + 2057 = 54

d)942-2567+2563-1942

= -1625 + 621 = -1004

e)12-12+11+10-9_8-7+5-4+3+-1

= 0

a, -65

b, -2277

c, 54

d,-1004

e,0

mk nhanh nhất k mk nhé Vu duc manh

a) 1125 - ( 374 + 1125 ) + ( - 65 + 374 )

= 1125 - 374 - 1125 - 65 + 374

= ( - 1125 + 1125 ) + ( - 374 + 374 ) - 65

= - 65

b) - 23 . 65 + 23 . 21 - 58 . 23

= 23 . ( - 65 + 21 -  23 )

= 23 . ( - 67 ) 

= - 1541

c) - 2003 + ( - 21 + 75+ 2003 )

= - 2003 + 2057 

= 54

d) 942 - 2567 + 2563 - 1942

= - 1625 + 621

= - 1004

e) 12 - 12 + 11 + 10 - 9 _ 8- 7 + 5 - 4 + 3 + -1

= 0

Nhah lên nhé mk đag cần gấp , bạn nào nhah tay mk k cho

a,1125-(374+1125)+(-65+374)

=1125-374-1125-65+374

=-65

Giup mk với mấy bạn ơi

Bài 2:

a) 1125 - ( 374 + 1125) + (-65 +374)

= 1125 - 374 + 1125 + -65 + 374

= [ 1125 + (-1125)] + [(-374) + 374] + (-65)

= 0 + 0 + (-65)

= -65.

b) -23 . 63 + 23 . 21 - 58 . 23

= 23.(-63+23-58)

= 23.(-100)

= -2300.

c) -2003 + (-21+75+2003)

= -2003 + (-21) + 75 + 2003

= [(-2003) + 2003] + [(-21)+75]

= 0 + 54

= 54.

d) 942 - 2567 + 2563 + 1942

= [942 + (-1924)] + [(-2567)+2563]

= (-1000) + (-4)

= -1004.

e) 12 -12 + 11 + 10 - 9 + 8 - 7 + 5 - 4 + 3 + 2 -1

= (12 -12) + 11 + (10 - 9) + (8-7) + (5-4) + 3 + (2-1)

= 0 + 11 + 1 + 1 + 1 + 3 + 1

= 18.

Chúc bạn học tốt !!!

a, 1125 - ( 375 + 1125 ) + ( -65 + 374)

= 1125 - 1500 + 209

= 1125 - 1709

= -584

b, -23 .63 + 23.21 - 58.23

= -1449 + 483 - 1334

= -1449 + (-851)

= -2300

c,-2003 + ( -21 + 75 + 2003)

= -2003 + (-21) + 75 + 2003

= ( -2003 + 2003 ) + (-21 + 75 )

= 0 + 54

= 54

d, 942 - 2567 + 2563 - 1942

= (942 - 1942 ) + (2567 - 2563 )

= -1000 + 4

= -996

e, 12 - 12 + 11 + 10 - 9 + 8 - 7 + 5 -4 +3 -2 -1

=14

a.

=1125-1499+309=-374+309=-65

b.

= 23.(-63+21-58)=23.(-100)=-2300

c.

=-2003-21+75+2003

=-21+75=54

d.

=(942-1942)+(-2567)+2563=-1000+(-4)=-1004

e.

=(12-12)+11+(10-9)+(8-7)+(5-4)+3+(2-1)

=0+11+1+1+1+3+1=18

chúc bạn hk tốt

a: \(=1125-374-1125-65+374=-65\)

b: \(=-2003+54+2003=54\)

c: \(=\left(942-1942\right)+\left(-2567+2563\right)=-4-1000=-1004\)

e: \(=\left(1000-570-430\right)+2341=2341\)

f: \(=\left(-596-404\right)+\left(2001+1999\right)+189\)

\(=3189\)

a) 2003 + ( - 21 + 75 + 2003 )

= 2003 + 2057

= 4060 

b) 1152 - ( 374 + 1152 ) + ( - 65 + 374 )

= 1152 - 374 - 1152 + (- 65) + 374 

= 1152 - 1152 - 374 + 374 + ( - 65 )

= 0 - 0 + ( - 65 )

= (-65)