50+50+50+50+60+60-20

=300

chuc bn hoc gioI

nhae@

bn#^_^

hâm tự trả lời cho chính mình

50 + 50 + 50 + 50 + 60 + 60 - 20

= 300

nha bn

_mk k bn r`_

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

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

\(=100+100+100\)

\(=100.3\)

\(=300\)

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

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

50+50+50+60+40

=50.3+60+40

=150+60+40

=150+(60+40)

=150+100

=250

nhae

=250

k mình nha mình k lại!!!Cảm ơn trc!!!

= 250

K MÌNH NHA 

x+60=100

    x= 100-60

    x= 40

x+50=50

    x= 50-50

    x=0

tk nhé

số x đó là

x+60=100

x=100-60

x=40

x+50=50

x=50-50

x=0

nhe sbn

=40

=0

k mik nha

\(60+40+50+50+40+5+95+50+10\)

\(=\left(60+40\right)+\left(50+50\right)+\left(40+50+10\right)+\left(95+5\right)\)

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

\(=100.4\)

\(=400\)

nho gui tin nhan do

60 + 40  + 50 + 50 + 40 + 5 + 95 + 50 + 10

= 100 + 100 + 45 + 145 + 10

= 200 + 200

= 400

chúc bạn học tốt ^ _ ^

=(60+40)+(50+50)+(40+10+50)+(5+95)

=100+100+100+100

=400

Nguyễn Trọng Kiên

20+50+70

=70 + 70

=140.

Ai k mk,mk k lại!

140 nha 

=140 nhoa bn,tk nha

20

40

60

80

100

120

kb minh nha

10+10=20

20+20=40

30+30=60

40+40=80

50+50=100

60+60=120

10 + 10 = 20

20 + 20 = 40

30 + 30 = 60

40 + 40 = 80

50 + 50 = 100

60 + 60 = 120

= 550

NHo nhe !!!

10 + 20 + 30+40+50+60+70+80+90

=(10+90) + (20+80)+(30+70) + (40+60) + 50

=100+100+100+100+50

=400+50

=450

10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100

= ( 10 + 100 ) + ( 20 + 90 ) + ( 30 + 80 ) + ( 40 + 70 ) + ( 50 + 60 ) 

= 110 x 5 = 550