Răspuns :

Ella4521id

Răspuns:

a) 3 1/2–8,2×0,3=

=(3×2+1)/2-=7/2-2,46=

=3,5-2 46=1,04

b) (2,4)² –5,6:1,4=5,76-4=1,76

5,6÷1,4=56÷14=4

c) 1,3² -0,2³×5²+4-31=

=1,69-0,2×25+4,31

=1,69-5+4,31=

=1,69+4,31-5=

=6-5=

=1

d) (1/4-0.25)×2018=

=(0,25-0,25)×2018=

=0×2018=

=0

e) 13 2/5 - 11,2÷9 1/3=

=(13×5+2)/5-11,2÷(9×3+1)/3=

=67/5-11,2÷28/3=

=13,4÷9,33=

=1,200=

=1,2

f. 3/4÷(0,8-0.65)=

=0,75-0,15=

=0,60=

=0,6

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