Question

Calculează grupând convenabil conform modelului:
7+4=7+3+1=10+1=11
9+7=
6+5=
9+9=

7+4=1+6+4=1+10=11
8+6=
5+9=
7+6=

Answer 1

[tex]9+7=9+1+6=10+6=16\\ 6+5=6+4+1=10+1=11\\ 9+9=9+1+8=10+8=18\\ \\ 8+6=4+4+6=4+10=14\\ 5+9=4+1+9=4+10=14\\ 7+6=3+4+6=3+10=13 [/tex]