For example, to round the number 1,121,565 to the nearest million, look at the digit in the hundred ... 3 is in the ones column. To round a number to the nearest 100, look at the tens digit.

We can also show this as a part-whole model and a bar model. Each way of showing the calculation shows part + part = whole. 75 is the whole number and 43 and 32 are the parts. When a number is ...