Question

Помогите пожалуйста!!!

Answer 1

3) 3.2 + 1.12 - 1.4 = 2.92

4) 1.4 < 2 < $2frac{2}{7}$

1.4 < $frac{11}{7}$ < $frac{16}{7}$  (11/7 около 1.57)

5) $x + 3frac{4}{21} = 4 frac{5}{14} + 5 frac{1}{12} \\x + frac{67}{21} =  frac{61}{14} +  frac{61}{12} \\x + frac{67}{21} = frac{366+427}{84} = frac{793}{84}\\ x = frac{793}{84} -  frac{268}{84} =  frac{525}{84} = 6frac{21}{84} = 6  frac{1}{4}$

Answer 2

11/7 = 1целая 4/7