<span>(<u /> y-4) (y+2)-(y-2)=</span><span>(<u /> y-4) (y+2)-y+2=2y+2y-4y-8=4y-4y-8=8</span>
4 1/2 + 3 1/5 = 9/2 + 16/5 =(9 × 5 16 × 2)/10 = 45/10 + 32/10 = 77/10 = 7 7/10
77/10 ÷ 113 = 77/10 × 1/113 = 77/1130
ответ 77/1130
<span>(0,018+0,982)/(8*0,5-0,8)=0,3125
0,018+0,982=1
8*0,5=4
4-0,8=3,2
1/3,2=0,3125
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9) -12*(-8,6)-9,4=103,2-9,4=93,8
10)6,8-11*(-6,1)=6,8+67,1=73,9