Question

ПОМОГИТЕ, УМОЛЯЮ, ОТВЕТ ПОМЕЧУ ЛУЧШИМ!​​

Answer 1

Ответ:

$2.9 + ( - 7.4) = 2.9 - 7.4 = - 4.5 \\ - 2 \frac{1}{3} + ( - 1 \frac{7}{9} ) = - 2\frac{1}{3} - 1 \frac{7}{9} = - (2 \frac{1}{3} + 1 \frac{7}{9} ) = - ((2 + 1) + ( \frac{1}{3} + \frac{7}{9} )) = - (3 + \frac{10}{9} ) = - (3 + 1 \frac{1}{9} ) = - (3 + 1 + \frac{1}{9} ) = - (4 + \frac{1}{9} ) = - 4 \frac{1}{9}$