Addition and Subtraction

Lesson

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.

What is $20+10$20+10?

$68+10$68+10

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

$30$30, $\editable{}$, $\editable{}$, $\editable{}$, $\editable{}$, $\editable{}$

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