Easy- use a calculator-
100+12345+678=13123
It is so easy using a calculator: 13123
They are: 12343+2 = 12345
14690
12300
The same as 12345 x 12345 x 12345.The same as 12345 x 12345 x 12345.The same as 12345 x 12345 x 12345.The same as 12345 x 12345 x 12345.
A hundred percent as a fraction is any number over itself such as 100/100, 4/4, 37/37, 12345/12345, 248/248, 1/1
12345 + 12345 = 24690
sqrt 12345 is about 111.1062 so the next perfect square is 1122= 12544 so you have to add 199
The expanded notation for 12345 = 10,000 x 1 + 1,000 x 2 + 100 x 3 + 10 x 4 + 5
24690.
12345-123 = 12222
823x15=12345