Question

Pilne na na już!!! daje 15 pkt!

Oblicz:

a)(1 1/4(jedna cała jedna czwarta) - 0,25 * 4+ 6 1/2):3=

b)(pierwiastek z (2/5)^2-(1,2* 5/12-0,8* 1/23)=



PROSZĘ O NATYCHMIASTOWĄ POMOC! DAJE NAJ

Answer 1

a)(1 1/4- 0,25 * 4+ 6 1/2):3=

= (5/4 - 1/4 *4 + 13/2 )*1/3  =

=(5/4 -1 + 13/2)*1/3=

=(5/4 -4/4 + 26/4)*1/3=

= 27/4 *1/3 =

= 9/4 =

=2  1/4

b)(√ (2/5)^2-(1,2* 5/12-0,8* 1/23)= 

=(2/5 -(12/10 * 5/12 - 8/10 * 1/23)=

=(2/5 - (1/2 - 8/230)=

=(2/5 -(115/230 - 8/230) =

= (2/5 - 107/230) =

= 92/230 - 107/230 =

= -15/230 =

=-3/46