45, 13, 26, 5=1170))))))))
28,8 : 6 * 5 = 24 - первый
28,8 : 3 * 8 = 76,8 - третий
24 + 28,8 + 76,8 = 129,6 - за три дня
87*43+(87³-43³)/44
87*43+(87-43)(87²+43²+87*43)
87*43+44*(87²+43²+87*43)/44=87²+2*87*43+43²=(87+43)²=130²=16900
-------------------------------
69³+51³/120=(69+51)(69²-69*51+51²)/120 69+51=120
69²-2*69*51+51²=(69+51)²=120²=14400
3* 1/2 = 1/2 +1/2+1/2 =3/2
5 * 2/3 =2/3+2/3+2/3+2/3+2/3= 10/3 =3 1/3
6 : (1/2+1/2) = 6(2 * 1/2) =6
(1/5+1/5+1/5)*1/3 = 3/(3*5)=1/5
-4/7; -3
-0,2; - 2
4/9; - 1
-1 1/12 - 4