\(\text{(-123) +|–13| +(-7)}\)

\(\text{= (-123) + 13 + (-7)}\)

\(\text{= (-110) + (-7)}\)

\(=\text{(-117)}\)

b

a: \(145+43+\left(-145\right)+57\)

\(=\left(145-145\right)+\left(43+57\right)\)

=0+100

=100

b: \(\left(-123\right)+101+\left(-777\right)+99\)

\(=\left(-123-777\right)+\left(101+99\right)\)

=-900+200

=-700

c: \(\left(-8955\right)+33+\left(-45\right)+\left(-133\right)\)

\(=\left(-8955-45\right)+\left(33-133\right)\)

\(=\left(-9000\right)+\left(-100\right)=-9100\)

d: \(\left(-2\right)+\left(-4\right)+\left(-6\right)+\left(-8\right)+\left(-10\right)+8+10+12\)

\(=\left(12-2\right)+\left(-4-6\right)+\left(-8+8\right)+\left(-10+10\right)\)

=10-10+0+0

=0

a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.

b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.

c) 126 - (126 - 33) = 126 -126 + 33 = 33.

d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590

a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.

b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.

c) 126 - (126 - 33) = 126 -126 + 33 = 33.

d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590

123+123=246

22+33=55

kick mik nha bạn

123+123=246

22+33=55

246 và 55

123.34+123.45+123.20+123   
= 123. (34+ 45+ 20+ 1)   
= 123. 100   
= 12300

123.34+123.45+123.20+123

=123.(34+45+20+1)

=123.100

=12300

Các tinhs chất:giao hoán,kết hợp,phân phối

123.34+123.45+123.20+123   
= 123. (34+ 45+ 20+ 1)   
= 123. 100   
= 12300

123 x 56 + 123 x 45 - 123

= 123 x (56 + 45 - 1)

= 123 x 100

= 12300

123x56+123x45-123

123x56+123x45-123x1

123x(56+45-1)

123x(101-1)

123x100

12300

=123x(56+45-1)

=123x100

=12300

giúp hộ các bạn ơi

a: =48x90-90x52

=-360