Răspuns :
Răspuns:
1)
a)879+363:11-25x36=
879+33-900=
912-900=12
b)16x16-975:75-9x27=
256-13-243=
243-243=0
c)15x18-490:70-261=
270-7-261=
263-261=2
d)56x72:126+222-88=
4032:126+222-88=
32+222-88=
254-88=166
2)
A=9
B=63
A<B
3)
(12x24)+(ax18)=828
288+(ax18)=828
ax18=828-288
ax18=540
a=540:18
a=30
Răspuns:
Explicație pas cu pas:
2.
A=(25)^27:(25)^26-(1+0+1)^4=25-2^4=25-16=9
B=2^7-11{91-5[22-5(40²-41·39)]}+(9-8)^2017=
=128-11{91-5[22-5(1600-1599)]}+1
=128-11[91-5(22-5)]+1==128-11(91-5·17)+1=129-11(91-85)=129-11·6=
=129-66=63
A=9 si B=63 ⇒B>A
3.
828=12·24+18·n
828=288+18n 18n=828-288 18n=540 ⇒n=30cutii mari
1.
a)879+363:11-25·36=879+33-900=912-900=12
b)16²-975:75-9·27=256-13-243=256-256=0
c)15·18-490:70-261=270-7-261=270-268=2
d)56·72:126+222-88=32+222-88=254-88=166