Question

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

Answer 1

bang 350 

ai tk minh

minh tk lai

Answer 2

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

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

= 100 + 100 + 100 + 50

= 100 x 3 + 50

= 300 + 50

= 350

ai k mik mik k lại

Answer 3

20+30+40+50+60+70+80=350 ahihi

Answer 4

20 + 30 + 40 + 50 + 60 + 70 + 80 

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

= 100 + 100 + 100 + 50

= 100 x 3 + 50

= 300 + 50

= 350

NHỚ bấm đúng cho mình nha

Answer 5

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

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

= 100           +   100        +   100          + 50

= 100 x 3 + 50

= 300 + 50

= 350

Answer 6

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

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

=100+100+100+50

=350

k minh nha

Answer 7

=350 nhé

Answer 8

bang 350 ick nha

Answer 9

=350 NHA

Answer 10

=350 nha ban