Răspuns:
7. 54-[100-(42+10)]+25
=54-(100-52)+25
=54-48+25
=6+25
=31
8.[9+7×(1+6):7]:2
=(9+7×7:7):2
=(9+7×1):2
=(9+7):2
=16:2
=8
9. 6+6×(1+50:10)-0
=6+6×6-0
=6+36-0
=42-0
=42
10.(0+3:3+4-4:2)×10
=(0+1+4-2)×10
=3×10
=30
