11081957vera 2 1/6 + 1/18* 3/4= 2 5/24
1) 1/18*3/4 =1*3/18/4 =1/24
2.) 2 1/6 + 1/24 = 13/6+ 1/24= 52/24+ 1/24 = 53/24 =2 5/24
Б
4 11/48 * 6/7 - 1 4/9=2 13/72
1). 4 11/48* 6/7= 203/48*6/7= 203*6/48*7=29/8
2).29/8-1 4/9 =29/8 - 13/9 =261/72- 104/72=157/72=2 13/72