Ответ:
а) 2·(−4) + (−2)·(−6) − (−9)·5 = −8 + 12 + 45 = 49.
б) −3 5/12 − 2 4/15 = −41/12 − 34/15 = −205/60 − 136/60 = −341/60 = −5 41/60.
в) −4/11 · 3 2/3 = −4/11 · 11/3 = −4/3 = −1 1/3.
г) −2 1/4 · 1,4 = −9/4 · 7/5 = −63/20 = −3,15.
а) 2·(−4) + (−2)·(−6) − (−9)·5 = −8 + 12 + 45 = 49.
б) −3 5/12 − 2 4/15 = −41/12 − 34/15 = −205/60 − 136/60 = −341/60 = −5 41/60.
в) −4/11 · 3 2/3 = −4/11 · 11/3 = −4/3 = −1 1/3.
г) −2 1/4 · 1,4 = −9/4 · 7/5 = −63/20 = −3,15.