Как я помню там равно 0 и остаток 2
7 11/15-(3 9/20+1 1/30)=7 11/15-4 29/60=3 1/4
Первая 8см, вторая 10см,а третья 6 см
<span>Nick had to be at the airport at 6.30 in the morning. He ______ 1) (order) a taxi beforehand to pick him up at 5 o’clock. But the driver of the taxi ______ 2) (work) late the previous night and he _______ 3) (oversleep).Nick _____ 4) (wait) for three hours in vain. He _____ 5) (swear) quietly and went to switch the electric kettle. He ________ 6) (pour) water into the kettle when the eight o’clock pips ______ 7) (sound) on the radio. The announcer began to read the news. ”Reports _____8) (come) in of a crash near Heathrow Airport. A Boeing 707 _____ 9) (crash) shortly after taking off this morning. Flight number 8552….”.Nick turned pale.</span>
300-(60+60)=180
540-(300+60)=180
P.S - тут по-любому можно, просто чтобы разность была равна 240, если НЕ прибавлять 60...