Question

30+30-30-30

Answer 1

30 + 30 - 30 - 30 = 0

Answer 2

30+30-30-30

=60-60

=0

Answer 3

30 + 30 - 30 - 30 = 60 - 30 - 30 

                         =         0

Answer 4

30 + 30 - 30 - 30 = 0

k nha

Answer 5

30 + 30 - 30 - 30

= 30 + 30 + (-30) + ( -30)

= 60 + ( -60)

= 0

Answer 6

30+30-30-30

=60-30-30

=30-30

=0

Answer 7

30+30-30-30=0

kick mình nhé

Answer 8

30+30-30-30=60-60

=0

Answer 9

30+30-30-30=0

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Answer 10

30+30-30-30=0

kick mình nhé

Answer 11

30+30-30-30=0

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Answer 12

30+30-30-30=0 Thank you very much

Answer 13

30+30-30-30=0