a) (600:30-7),5-(24-4.4)·(32:16)+60:4

Решение:

\( 600 : 30 = 20 \)

\( 20 - 7 = 13 \)

\( 13 \cdot 5 = 65 \)

\( 24 - 4.4 = 19.6 \)

\( 32 : 16 = 2 \)

\( 19.6 \cdot 2 = 39.2 \)

\( 60 : 4 = 15 \)

\( 65 - 39.2 + 15 \)

\( 25.8 + 15 = 40.8 \)

Ответ: 40.8