Условие:

Найди значения выражений a + 1, a − 1, a : 1000, a * 10 при a = 1000, a = 100000, a = 1000000.

при a = 1000:
a + 1 = 1000 + 1 = 1001;
a − 1 = 1000 − 1 = 999;
a : 1000 = 1000 : 1000 = 1;
a * 10 = 1000 * 10 = 10000.
 
при a = 100000:
a + 1 = 100000 + 1 = 100001;
a − 1 = 100000 − 1 = 99999;
a : 1000 = 100000 : 1000 = 100;
a * 10 = 100000 * 10 = 1000000.
 
при a = 1000000:
a + 1 = 1000000 + 1 = 1000001;
a − 1 = 1000000 − 1 = 999999;
a : 1000 = 1000000 : 1000 = 1000;
a * 10 = 1000000 * 10 = 10000000.