Răspuns:
•(8×9-4:2)-(91-9×9)=(72-2)-(91-81)
=70-10
=60
•100-(27+7×6-48:8):7=100-(27+42-6):7
=100-(69-6):7
=100-64:7
=100-9
=91
•(4×8+3×9+21):10:(40-9×4)=(32+27+21):10:(40-36)
=(59+21):10:4
=80:10:4
=8:4
=4
•56:(100-8×5-6×5-7×3-1)=56:(100-40-30-21-1)
=56:(60-30-21-1)
=56:(30-21-1)
=56:(9-1)
=56:8
=7
•(24+6×2):4+7-(28-12:3):6=(24+12):4+7-(28-4):6
=36:4+7-24:6
=9+7-4
=16-4
=12
•(54:6×3-6×2):3=(9×3-12):3
=(27-12):3
=15:3
=5
•(2×3×3):2×(45:9+72:8-16:2)=(6×3):2×(5+9-8)
=18:2×(14-8)
=6×6
=36
•4×3+15-7×2+37-8×6=12+15-14+37-48
=27-14+37-48
=13+37-48
=50-48
=2
•19+(6×7-18)-2×9=19+(42-18)-18
=19+24-18
=43-18
=25
•73-58+29-4=15+29-4
=44-4
=40
•24:8×3×4:6=3×3×4:6
=9×4:6
=36:6
=6
•30+32:8+8×7-100:10=30+4+56-10
=34+56-10
=90-10
=80
•20-(3×5-2+3):(26-9×2)=20-(15-2+3):(26-18)
=20-(13+3):8
=20-16:8
=20-2
=18
•10×4:5×3+32-32:8×7=40:5×3+32-4×7
=8×3+32-28
=24+32-28
=56-28
=28
•89+64:8×7-28:7×4=89+8×7-4×4
=89+56-16
=33-16
=17
•(25:5-7:7)+(36:9+8×0)=(5-1)+(4+0)
=4+4
=8
•815-24:2:2=815-12:2
=815-6
=809
•50:10:5+90:9=5:5+10
=1+10
=11
•12+6:(3+9:3)=12+6:(3+3)
=12+6:6
=12+1
=13
•21-21:7×(4-5:5)=21-3×(4-1)
=21-3×3
=21-9
=12
Sper ca te-am ajutat!:)
