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Efectueati:
f)[2 la 12 *2 la 18+25 la 65:5 la 10-(3 la 5 2) la 2]:[4 la 2 *2 la 3*2 la 23+(5 la 15) la 2 3-(3 la 2) la 5 2]=
g)[6*10 la 3-(25*4-40)*5]-(10 la 2 *7+10 la 3:25*35)=
h)(3 la 52 - 3 la 51-3 la 50) la 2:(9 la 50*25)
i)[(5-2 la 2 ) la 10+(17-2 la 4)la 13] la 5=
j) (5 la 42-5 la 41-5 la 40):(25 la 19*19)=
k)2 la 3+[(2 la 3) la7-(2 la7) la 3]*3*3 la 1994=
p)10*{21 la 2:441+2*[(2 la 60*3 la 20):(2 la59* 3 la 20)-1995 la 0 ]}=


Răspuns :

f)[2^12 *2^18+25^65:5^10-(3^5^2)^2]:[4^2 *2^3*2^23+(5^15)^2 3-(3^2) la 5 2]=
=
[2^30+5^130:5^10-(3^50)]:[2^4 *2^3*2^23+(5^15)^2 3-(3^2)^25]=
=[2^30+5^120-3^50]:[2^30+(5^15)^8-3^50]=
=
[2^30+5^120-3^50]:[2^30+(5^120-3^50]=1

 g)[6*10^3-(25*4-40)*5]-(10^2 *7+10^3:25*35)=
=
[6*1000-(100-40)*5]-(700+1000:25*35)=
=[6000-300]-(700+40*35)=
=5700-(700+1400)=
=5700-2100=3600

 h)(3^52 - 3^51-3^50)^2:(9^50*25)=
=[3^50(3^2 - 3^1-3^0)]^2:(3^100*5^2) =
=[3^50 *(9 - 3-1)]^2:(3^100*5^2) =
=(3^50 * 5)^2:(3^100*5^2) =
=(3^100 * 5^2):(3^100*5^2) =1

i)[(5-2^2 )^10+(17-2^4)^13]^5=
=
[(5-4 )^10+(17-16)^13]^5=
=[1^10+1^13]^5=
=(1+1)^5=
=2^5=32

j) (5^42-5^41-5^40):(25^19*19)=
=5^40(5^2-5^1-5^0):(5^38*19)=
=
5^40(25-5-1):(5^38*19)=
=(5^40 * 19):(5^38*19)= 5^2=25

 k)2^3+[(2^3)^7-(2^7)^3]*3*3^1994=
=
2^3+(2^21-2^21)*3^1995=
=2^3+0*3^1995=
=2^3=8


p)10*{21^2:441+2*[(2^60*3^20):(2^59* 3^20)-1995^0 ]}=

=10*{21^2:21^2+2*[(2^60*3^20):(2^59* 3^20)-1995^0 ]}=
=10*[1+2*(2^1-1 )]=
=10*(1+2*1 )=
=10*3=30



a)1^2000+10^1= 1+10=11
11³=1331

b)5^2 - 3*2^2= 25*12=13
13³=2197

c)3^4-2*5^2=81-50=31
31³=29791

d) 2^5 - 3^3 =32-27=5
5³=125


n=243^2-(240^2+3*240)=
=
243^2-240(240+3)=
=243^2-240*243=
=243(243-240)=
=243*3=
=729=27²