a) 45a+8550:10=9855
45a+855=9855
45a=9855-855
45a=9000
a=9000:45
a=200
b) 100b-213=4785:55
100b-213=87
100b=87+213
100b=300
b=300:100
b=3
c) 9144-6c+(100×25):25=6064
9144-6c+2500:25=6064
9144-6c+100=6064
9244-6c=6064
6c=9244-6064
6c=3180
c=3180:6
c=530
d) 1458+25d-458=10000
1000+25d=10000
25d=10000-1000
25d=9000
d=9000:25
d=360
e) e:15+(1000-17)×5=5482
e:15+983×5=5482
e:15+4915=5482
e:15=5482-4915
e:15=567
e=567×15
e=8505
ordinea descrescătoare: 8505, 530,360,200,3 - Super
