Question

ex . 10, 13,14,15 pls

Answer 1

3
-
31 astai a nam putut mai mult

Answer 2

ex.10

a) 1/18+1/9+1/6=(1/18+1/9)+1/6=>1+2/18=1/6=>1*6=1/6=>1+1/6=1/3=0,33333
b)7/36+1/18+5/6+3/4=((7/36+1/18)+5/6)+3/=>7*2/36=1/4=>(1/4+5/6)+3/4=>
   3+5*2/12=13/12=>13/12+3/4=>13+3*3/12=11/6=1,83333
c)7/18+11/12+5/6=(7/18+11/12)+5/6=>7*2+11/3/36=47/36=>47/36+5/6=>47+5*6/36=77/36=2,13889
d)71/36+5/18+17/54+13/4=((71/36+5/18)+17/54)+13/4=>71+5*2/36=9/4=>(9/4+17/54)+13/4=>9*27+12*2/108=277/108=>277/108+13/4=>277+13*27/108=157/27=5,81481