x=100-99

x=1

x + 99 = 100

x = 100 - 99

x = 1

x=100-99

x=1

x+100=155-55

x+100=100

        x=100-100

        x=0

vay x=0

 x+100=155-55

=>x+100=100

=>x=0 

Vậy x=0

nhớ tích minh nha

x + 100 = 155 - 55

x + 100 = 100

x = 100 - 100

x = 0

nha bn

99 + 1 + 99 + 2 + 99 + 7 

= 307

k mk nha pạn

cảm ơn trước

99+1+99+2+99+7

= 307

NHA BN K MK NHA 

T H A N K   Y O U

Tổng trên bằng :

99 + 1 + 99 + 2 + 99 + 7 = 100 + 101 + 106 = 307

Đáp số : 307

50+50+80+20+60+55+44+1+40=400 nha

\(50+50+80+20+60+55+44+1+40\)

\(=\left(50+50\right)+\left(80+20\right)+\left(60+40\right)+\left(55+44+1\right)\)

\(=100+100+100+100\)

\(=100.4\)

\(=400\)

nho gui tin nhan do

ok 

ko ghi lại đề 

= ( 50 + 50 ) + ( 80 + 20 ) + ( 60 + 40 ) + ( 55 + 44 + 1 ) 

=      100              100              100             100

=    100 x 4 

= 400

mình k rồi , bạn k vô mình đi . 300

\(60+40+55+45+10+90\)

\(=\left(60+40\right)+\left(55+45\right)+\left(10+90\right)\)

\(=100+100+100\)

\(=100.3\)

\(=300\)

\(nha^{ }\)

60+40+55+45+10+90

= (60+40) + (55+45) + (10+90)

= 100 + 100 + 100

= 300

50+50+90+10+55+45=100+100+100=300

50+50+90+10+55+45

=100+100+100

=300

tk nhé

k mình đi

\(99.2+99.7+99\)

\(=99.2+99.7+99.1\)

\(=99.\left(2+7+1\right)\)

\(=99.10\)

\(=990\)

nha To the

=99.(2+7)+99

=99.9+99

=891+ 99

=990

99.2+99.7+99

=99.2+99.7+99.1

=99.(2+7+1)

=99.10

=990

\(50+60+40+50+50+45\)

\(=\left(50+50\right)+\left(60+40\right)+\left(45+55\right)\)

\(=100+100+100\)

\(=100.3\)

\(=300\)

the lun

50+60+40+50+45

=(50+50)+(60+40)+45

=100+100+45

=200+45

=245

50+60+40+50+55+45

=(50+50)+(60+40)+(55+45)

=100+100+100

=100x3

=300

k mk nha bn vvvvvvvvvvvvvvv

78+22+99+1+2+88=290

90

ung ho nha!!

\(78+22+99+1+2+88\)

\(=\left(78+22\right)+\left(99+1\right)+\left(2+88\right)\)

\(=100+100+100\)

\(=100.3\)

\(=300\)

\(the\\ luon\)