7. 199993, 199994, 199995, 199996, 199997, 199998, 199999, 200000 => 8 numere
8. 90÷ 3= 30 (lei un atlas)
1 atlas..... 30 lei
x atlase.... 190 lei
1/x=30/190
30x=190
X=190/30
X= 6,(3)=> se pot cumpăra 6 atlase
9. a+b=196
b=a+2=>
=> a+a+2=196
2a+2=196
2a=196-2
2a=194
a=194/2
a=97
b=97+2
b=99=> cel mai mare este b, 99
10. 8531
