Răspuns:
1. 1059-254=805
1059+254= 1313
2.2011×45+56×2011-2011=201.000
3.1769÷32=55 rest 9
4.9¹²-9¹⁵÷(9³)⁹=9¹²×9¹⁵÷9²⁷=9²⁷÷9²⁷=1
5.19⁰+1⁵³+2³+0¹⁰⁰⁰=1+1+8+0=10
6. 9⁵ >27³
(3²)⁵ > (3³)³
3¹⁰ > 3⁹
7. 8/40=17/x=>8x=680=>x=85
8.D30={1,2,3,5,6,10,15,30}
9.2x9x divizibil cu 2=>x-cifra para>x=0,2,4,6,8=>2x9x=2090,2292,2494,2696,2898
10. 57x divizibil cu 3=>5+7+x divizibil cu 3=>x=0, 3,6,9=>57x=570,573,576,579
