Question

Вычислите 1)1–13/21=?/21–13/21= 2)4–2/9=3 ?/9–2/9= 3)7–1 3/7= 4)10–5 3/7
Вычислите плииз

Answer 1

1)1-13/21=21/21-13/21=8/21=0,3
2) 4-2/9=3 9/9-2/9=36/9-2/9=34/9=6,8
3) 7-1 13/16=7-29/16 = 112-29/16=83/16=5,1
4) 10-5 3/7=10-28/7=70-28/70=42/70=6/10=3/5