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Blaj2
a fost răspuns

36:4+a =30,a+25:5=31.a+21:7=12,a+25:5=80,32:4+a=16,45:5-a=2,15:3-a=1,30:5+a=17

Răspuns :

Carmensoho
36:4+a=30
9+a=30
a=30-9
a=21

a+25:5=31
a+5=31
a=31-5
a=26

a+21:7=12
a+3=12
a=12-3
a=9

a+25:5=80
a+5=80
a=80-5
a=75

32:4+a=16
8+a=16
a=16-8
a=8

45:5-a=2
9-a=2
a=9-2
a=7

15:3-a=1
5-a=1
a=5-1
a=4

30:5+a=17
6+a=17
a=17-6
a=11

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