Question

Rezolvati-mi si mie va rog exercitiile astea

Answer 1

[(7:7+4):5+9]x78=780
=[(1+4):5+9]x78=
=(5:5+9)x78=
=10x78=
=780

[(60:6+20)+25]:5=11
=[(10+20)+25]:5=
=(30+25):5=
=55:5=
=11

900+300:10-[76+(290-206)]=770
=900+30-(76+84)=
=930-160=
=770

[(10:10+4):5+9]x1000+700:100+11x8=10095
=[(1+4):5+9]x1000+7+88=
=(1+9)x1000+7+88=
=10000+7+88=
=10095

[420:(160-500:4)+25x4]x100=
=[420:(160-125)+100]x100=
=(420:35+100)x100=
=(12+100)x100=
=121x100=
=12100

[20x(8-100:25)+2x10]:10+17x100=
=[20x(8-4)+20]:10+1700=
=(20x4+20):10+1700=
=100:10+1700=
=10+1700=
=1710