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Va rooog frumoooooos ex incercuite a c j va roog repede dau 55 de puncte!!!!

Va Rooog Frumoooooos Ex Incercuite A C J Va Roog Repede Dau 55 De Puncte class=

Răspuns :

DelaDeluta
a) (0.4+3.2)x(2-0.25)=
0.4+3.2=3.6
2-0.25=1.75
3.6x1.75=6.3

c)(5,4x0,2-0,4)x(15,2x0,3x16)
    5.4x0.2-0,4=0,68
    15.2 x0.3x16=20
     0,68x20=13.6 
J nu il stiu.Si ''x'' inseamna ori.
El453
a) (0,4+0,32)×(2-0,25)
=0,72×1,75
=1,26

c) (5,4×0,2-0,4)×(15,2+0,3×16)
=(1,08-0,4)×(15,2+4,8)
=0,68×20
=13,6

j) (2,5²-0,5²)× ( [tex] \frac{1}{2} [/tex] -0,4 )
=(6,25-0,25)×( [tex] \frac{1}{2} - \frac{4}{10} [/tex] )
=6×( [ tex] \frac{5}{10} - \frac{4}{10} )
=6× [tex] \frac{1}{10} [/tex]
= [tex] \frac{3}{5} [/tex]
=0,6

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