Question

(1/2-1/5)-(4/15-7/30)-2/15 рЕШИТЕ ПЛИЗ

Answer 1

(1/2-1/5)-(4/15-7/30)-2/15=(5/10-2/10)-(8/30-7/30)-2/15=3/10-1/30-2/15=9/30-1/30-4/30=4/30=2/15

Answer 2

спасибо!