tentukan nilai dari a.|-3+10| b.|2-11+4| c.|2/5-1/3| d.|2/5-1/3-6/7| tolong yaa jawab

1) 7
2) 5
3) -
4) -

maaf kalau salah

a)(-3+10)=-3+10
=7
b)(2-11+4)= -9+4
= -5
c)(2/5-1/3)
=6/15-5/15
=1/15
d)(2/5-1/3-6/7)
=2/5-6/7-1/3
=14/45-15/45-30/45
= -1/45-30/45
= -31/45