1. 2 1/4 + 5 9/3= 2. 1/7 + 1/2 = 3. 16/21 - 12/21= 4. 3/9-2/5= 5.2/5 - 2/7=

1.itu yg pertama 5 9/3 apa 5 3/9???
klo 5 9/3= 2 1/4+5 9/3= 2.25+8=10.25=10 1/4
5 3/9= 2 1/4+5 3/9= 1/2+5x1/3=1/2+5/3=13/6
2.1/7+1/2=2+7/14=9/14
3.16/21-12/21=4/21
4.3/9-2/5=1/3-2/5=5-6/15=-1/15
52/5-2/7=4/35