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a fost răspuns

Calculeaza, respectand ordinea efectuarii operatiilor: a) 2÷2+2×2-2, 3+3×3+3÷3-3, 4×4-4÷4+4. b) 5-5÷5+5×5, 6÷6+6×6-6, 7-7÷7+7×7. c) 8-8÷8+8×8, 9÷9+9×9-9, 10-10÷10+10×10.

Răspuns :

a) 2÷2+2×2-2 =
= 1+4-2=
= 5-2 =
= 3

3+3×3+3÷3-3=
=3+9+1-3=
=12+1-3=
=13-3=
=10

4×4-4÷4+4=
=16-1+4=
=15+4=
=19

b) 5-5÷5+5×5=
=5-1+25=
=4+25=
=29

6÷6+6×6-6
= 1+36-6=
=37-6=
=31

7-7÷7+7×7
=7-1+49=
= 6+49=
=55

c) 8-8÷8+8×8
= 8-1+64=
= 7+64=
=71

9÷9+9×9-9=
=1+81-9=
=82-9=
=73

10-10÷10+10×10=
=10-1+100=
=9+100=
=109

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