1)3 1/4+6,4-7,5=3 1/4+<span>6 2/5=9 13/20- 7 1/2 = 2 3/20(2,15)
6,4 = 6 2/5
7,5=7 1/2
</span>2)2/11×(14 1/3+2 1/6)=<span>14 1/3+2 1/6=16 1/2 =2/11*16 1/2 = 3
3)</span>16,5:2,745-1/19×57=<span>1/19×57=3=1/2:2 149/200=100/549-3=3 100/549</span>
16,5=16 1/2
2,745=2 149/200
НОК(18И60)=180
К(60)=60 120 180