Question

Calculati: 1/3+1/6; 7/12+3/4; 3/10+1/5+3/2; 7/20+3/4+1/5; 5-1/3-1/9-1/27; 12/7-3/14+11/28-1/4

Answer 1

a)1/3+1/6=(2+1)/6=3/6
b)7/12+3/4=(7+9)/12=16/12
c)3/10+1/5+3/2=(3+2+15)/10=20/10=2
d)7/20+3/4+1/5=(7+15+4)/20=26/20
e)5-1/3-1/9-1/27=(135-9-3-1)/27=122/27
f)12/7-3/14+11/28-1/4=(48-6+11-7)/28=46/28.