<span>-7+..3.= -4 </span>
<span><span>-7+(-3)= -10</span></span>
<span><span><span>7+(-3)=4</span></span></span>
<span><span><span><span>(-9)+8=-1</span></span></span></span>
<span><span><span><span><span>(-9)+(-8) = -17</span></span></span></span></span>
<span><span><span><span><span><span>9+(-8)=1</span></span></span></span></span></span>
<span><span><span><span><span><span><span>9+(-9)=0</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>(-11)+11=0</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span><span>-12+12=0 </span></span></span></span></span></span></span></span></span>
С-d =-3⇒c=d-3⇒c<d<span>;
</span>с-d=4 ⇒c=d+4⇒c>d;
c-d=0,2⇒c=d+0,2⇒c>d
<span>a) m-n=0,1 </span>⇒m=0,1+n⇒m>n<span>;
b) m-n=-1,2</span>⇒m=n-1,2⇒m<n<span>;
c) m-n =0 </span>⇒ m=n.
Х - одно число
1,15х - другое
х + 1,15х = 645
2,15х = 645
х = 645 : 2,15
х = 300 - одно число
300 * 1,15 = 345 - другое число
Нехай ∠АКВ=4х
∠СКВ=5х
∠АКВ+∠СКВ=180°
4х+5х=180°
9х=180°
х=180°/9
х=20°
Отже ∠АКВ=4х=4*20°=80°
∠СКВ=5х=5*20°=100°