Question

20 - 10 + 30 + 50 - 10 + 20 = ?

giúp tớ bài này đi nha ?

tick mình nha

Answer 1

20 - 10 + 30 + 50 - 10 + 20

= 10 + 30 + 50 - 10 + 20

=  40 + 30 + 50 - 10 + 20

= 70 + 50 - 10 + 20

= 120 - 10 + 20

= 110 + 20

= 130

Answer 2

20-10+30+50-10+20=100

tk cho tớ nha 

Answer 3

20 - 10 + 30 + 50 - 10 + 20 =

= 10 + 20 + 50 - 10 + 20

= 30 + 50 - 10 + 20

= 80 - 10 + 20

= 70 + 20

= 90

Answer 4

20-10+30+50-10+20=10+30+50-10+20=40+50-10+20=90-10+20=80+20=100

Answer 5

20-10+30+50-10+20=100

Answer 6

20 - 10 + 30 + 50 - 10 +20

=10 + 20 + 50  - 10 + 20

=30 +50 - 10 + 20

= 80 - 10 +20

=70 + 20

= 90

Answer 7

20-10+30+50-10+20=100

Answer 8

de ma , la:100