Извиняюсь я перепутала числа
А) 9:25-первая половина суток
б) 21:25-вторая половина суток
Т.е 808+Х=909 Х=909-808 Х=101
<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>
Там что стоит минусу или плюсы