1.) 9/5*4/3=3/5*4/1=12/5;
11,9-12/5=11,9-2,4=9,5.
2.) 33/2:11/1=3/2*1/1=3/2;
3/2+55/6=9/6+55/6=64/6=10 4/6=10 2/3.
3.) 83 2/10-80 1/6=83 6/30-80 5/30=3 1/30;
3 1/30*3/13=91/30*3/13= 7/10=0,7.
4.)0,28+1 1/3=7/25+1 1/3=21/75+1 25/75=1 46/75;
1 46/75:11/30=121/75*30/11=66/15=4,4.
1.) 9/5*4/3=3/5*4/1=12/5;
11,9-12/5=11,9-2,4=9,5.
2.) 33/2:11/1=3/2*1/1=3/2;
3/2+55/6=9/6+55/6=64/6=10 4/6=10 2/3.
3.) 83 2/10-80 1/6=83 6/30-80 5/30=3 1/30;
3 1/30*3/13=91/30*3/13= 7/10=0,7.
4.)0,28+1 1/3=7/25+1 1/3=21/75+1 25/75=1 46/75;
1 46/75:11/30=121/75*30/11=66/15=4,4.