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Add multiples of 10's to two digit numbers


We've already seen how to add multiples of 10 to a single digit number. Now we are going to add multiples of $10$10 to a $2$2 digit number.

This time we'll have to consider the hundreds place value, as it is more likely that our answer will end up as a $3$3 digit number.

Watch this video below to see how it's done.


Worked Examples

Example 1

What is $20+10$20+10?

Example 2


Example 3

Complete the pattern by adding $10$10 each time.

  1. $30$30, $\editable{}$, $\editable{}$, $\editable{}$, $\editable{}$, $\editable{}$




Know forward and backward counting sequences with whole numbers to at least 1000.

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