Răspuns :
a) 13 + 4 = 17 17 - 3 = 14
4 + 13 = 17 17 - 13 = 4
b) 2 + 16 = 18 18 - 2 = 16
16 + 2 = 18 18 - 16 = 2
c) 12 + 7 = 19 19 - 7 = 12
7 + 12 = 19 19 - 12 = 7
4 + 13 = 17 17 - 13 = 4
b) 2 + 16 = 18 18 - 2 = 16
16 + 2 = 18 18 - 16 = 2
c) 12 + 7 = 19 19 - 7 = 12
7 + 12 = 19 19 - 12 = 7
grupa 13,4,17 ->
13-4=9
17-4=13
17-13=4
grupa 18,2,16->
18-2=16
18-16=2
16-2=14
grupa 12,7,19->
12-7=15
19-12=7
19-7=12
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Sper ca asta trebuia sa fac!