a+21=570
a=570-21
A=549
Y-15=800
Y=800-15
Y=785
1)
56 : 4 = 14
258 – 14 = 244
2)
84 : 4 = 21
570 – 21 = 549
3)
75 : 5 = 15
800 + 15 = 815
a+21=570
a=570-21
A=549
Y-15=800
Y=800-15
Y=785
1)
56 : 4 = 14
258 – 14 = 244
2)
84 : 4 = 21
570 – 21 = 549
3)
75 : 5 = 15
800 + 15 = 815