Question

14.calculati:d)3,6(1)x0,36-0,2(3);e)1,8x1,3(8)-1,0(6),dau coroana!

Answer 1

3,6(1)x0,36-0,2(3);e)1,8x1,3(8)-1,0(6)=
=(361-36)/90x36/100-(23-2)/90=
=325/90x36/100-21/90=
=65/18x9/25-7/30=
=13/2x1/5-7/30=
=13/10-7/30=
=(39-7)/30=
=32/30=
=16/15=
=1,0(6)

e)1,8x1,3(8)-1,0(6)=
=18/10x(138-13)/90-(106-10)/90=
=9/5x125/90-96/90=
=9/5x25/18-16/15=
=5/2-16/15=
=(75-32)/30=
=43/30=1,4(3)