Răspuns:
a) 5+3=8 =(25+15):5=40:5=8
5+4=9=(40+32):8=72:8=9
b)6+3=9=(42+14):7=56:7=8
4+6=10=(16+24):4=40:4=10
Răspuns:
.
Explicație pas cu pas:
a. (25:5)+(15:5)=
= (25+15):5= 40:5=8
..........................................
(40:8)+(32:8)=
=(40+32):8=72:8=9
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b. (42:7)+(14:7)=
=(42+14):7=56:7=8
..........................................
(16:4)+(24:4)=
=(16+24):4=40:4=10
