I have 2 tens and 10 ones who am I?

Question

.................Using the base ten format need to determine what number has 2 tens and 10 ones.this is for second grade math

 

Answer 1

Hi Erika--

 

"Base 10" means just regular counting the way we usually do it--each time you get to 9 in a column, the 10th number means you start a new column.

 

Notice how each number from 1 to 9 has just one digit--when we get to the next number, we have to start a new column--that's why "10" has 2 digits in it.

 

So in Base 10, a 2 in the tens column would mean 20; and the "10 ones" would mean you jump from the ones column to the tens, meaning you now have one more 10.

 

So 2 tens + 1 ten = 3 tens, and 3 tens = 30.

 

Hope this helps!

 

Matt in New York