Question

6 класс нужно срочно решить за 10 минут!!!!

Answer 1

1)

а) $2626:13=202$

б) $28:1\frac{3}{4} =28:\frac{7}{4} =\frac{28*4}{7} =16$

в) $7\frac{1}{5} :1.2=\frac{36}{6} :\frac{12}{10} =\frac{36*10}{6*12} =5$

г) $1\frac{1}{4} :\frac{1}{4} =\frac{5}{4} :\frac{1}{4}=\frac{5*4}{4}=5$

2)

а)

$15:x=21:7\\\\15:x=3\\\\x=5$

б)

$11:x=33:9\\\\\frac{11}{x} =\frac{33}{9}\\\\11*9=33x\\\\99=33x\\\\x=3$

3)

а)

$\frac{x}{2.1} =\frac{10}{3}\\\\3x=2.1*10\\\\3x=21\\\\x=7$

б)

$\frac{4.2}{y} =\frac{7}{10} \\\\4.2*10=7y\\\\42=7y\\\\y=6$