Question

1)4/5 ×(-1 1/4) × 10/3
2)4/5 ×(-1 1/4) ÷ 10/3
3)4/5 +(-1 1/4) + 10/3
4)4/5 -(-1 1/4) - 10/3

помогите пожалуйста

Answer 1

1.

$frac{4}{5}*(-1frac{1}{4})*frac{10}{3}=-frac{4*5*10}{5*4*3}=-frac{10}{3}=-3frac{1}{3}$

2.

$frac{4}{5}*(-1frac{1}{4}):frac{10}{3}= -frac{4*5*3}{5*4*10}= -frac{3}{10}=-0.3$

3.

$frac{4}{5}+(-1frac{1}{4})+frac{10}{3}=frac{4}{5}-frac{5}{4}+frac{10}{3}=frac{4*4*3-5*5*3+10*5*4}{60}=frac{48-75+200}{60}=frac{173}{60}=2frac{53}{60}$

4.

$frac{4}{5} -(-1frac{1}{4}) -frac{10}{3}=frac{4}{5} +frac{5}{4} -frac{10}{3}=frac{4*4*3 +5*5*3-10*5*4}{60}=frac{48+75-200}{60}=-frac{77}{60}=-1frac{17}{60}$