Question

решите плиз! алгебра, ,,,,,,,,,,,,,,,,,,

Answer 1

7) 1 : 15/4 =4/15
1 : 5/3 =3/5
2 4/15 - 1 3/5 = 1 19/15 -1 9/15 = 10/15 =2/3
8) 5 16/90 +15/99 - 1 318/990 = 5 176/990 +150/990 -1 318/990 = 4 8/990= 4,0(08)
9) 2-1/2 =3/2
1: 3/2 =2/3
3- 2/3 = 7/3
1 : 7/3 =3/7
4 - 3/7 = 3 4/7
10) 2 *2*3*3 =36

Answer 2

сможете на листке написать!?

Answer 3

$(2+ frac{1}{3+ frac{3}{4}})-(1+ frac{1}{1+ frac{2}{3}})=(2+ frac{1}{ frac{15}{4}})-(1+ frac{1}{frac{5}{3}})=(2+ frac{4}{15})-(1+ frac{3}{5})=\\ ( frac{30+4}{15})- (frac{5+3}{5})= frac{34}{15}- frac{8}{5}= frac{34-24}{15}= frac{10}{15}= frac{2}{3}$


$4- frac{1}{3- frac{1}{2- frac{1}{2}}}=4- frac{1}{3- frac{1}{ frac{3}{2}}}=4- frac{1}{3- frac{2}{3}}=4- frac{1}{ frac{7}{3}}=4- frac{3}{7}= frac{28-3}{7}= frac{25}{7}=3 frac{4}{7}$


$36=36:2=18:2=9:3=3:3=1 Rightarrow 36=2cdot2cdot3cdot3$