Выражение 1. 9,5-(1,5+6-12) 2. 7,5mk*(-4)n 3. 3,7(ab-2c)-4ab+5c 4. 2(3n-4k)-3(5n+8k) 5. 3m(1,5-,5m+4mk)

1. 9,5-(1,5+6-12) =9,5-1,5-6+12=14
2. 7,5mk*(-4)n=-30mnk
3. 3,7(ab-2c)-4ab+5c =3,7ab-7,4c-4ab+5c =-0,3ab-2,4c
4. 2(3n-4k)-3(5n+8k) =6n-8k-15n-24k=-9n-32k
5. 3m(1,5-2k)-(1,5m+4mk) =4,5m-6mk-1,5m-4mk =3m-10mk