Răspuns :
Suma 9+8= 17 ,7+8=15,5+7=12,6+9=15
Diferenta , 18-7=11,15-6=9,12-8=4,13-9=4
Răspuns:
9+8= 17
7+8=15
5+7=12
6+9=15
b)18*7=126
15*6=90
12*8=96
13*9=117
Suma 9+8= 17 ,7+8=15,5+7=12,6+9=15
Diferenta , 18-7=11,15-6=9,12-8=4,13-9=4
Răspuns:
9+8= 17
7+8=15
5+7=12
6+9=15
b)18*7=126
15*6=90
12*8=96
13*9=117