The amount remaining is the answer. There are 2 tens left which is 20 and 5 ones which is 5. As with the other example we will use a place value chart to work out the answer. The whole number is ...

When a number is made up of more than one digit ... so we add 2 packets of pencils to the tens column and 5 marbles to the ones column. Now let's add the second number to the place value chart.