Explicație pas cu pas:
1. [(4:4+4):5+9]×234=
=[(1+4):5+9]×234=
=(5:5+9)×234=
=(1+9)×234=
=10×234=
=2340
2. [(50:10+25)+25]:5=
=[(5+25)+25]:5=
=(30+25):5=
=55:5=
=11
3. [(3+3)×20]:120+9×11=
= (6×20):120+99=
=120:120+99=
=1+99=
=100
4. 793+200:10-[76+(293-209)]=
=793+20-(76+84)=
=813-160=
= 653
5. [(9:9+4):5+9]×234+500:25+15×4=
=[(1+4):5+9]×234+20+60=
=(5:5+9)×234+80=
=(1+9)×234+80=
=10×234+80=
=2340+80=
=2420
6. [420:(160-1000:8)+24×5]×10=
=[420:(160-125)+120]×10=
=(420:35+120)×10=
=(12+120)×10=
=132×10=
=1320
7. [20× (8-200:50)+5×4]:10 +25× 10=
=[20×(8-4)+20]:10+250=
=(20×4+20):10+250=
=(80+20):10+250=
=100:10+250=
=10+250=
=260
