counting on

SUBTRACTION – COUNTING ON TO TAKE AWAY?

This morning you will be learning another strategy to do subtraction.  We will be counting on to take away by finding the DIFFERENCE between the two numbers using the empty number line.

  • It is so much easier to count on rather than count back. You can have a go on your own later or at home to use the strategy online with this SUBTRACTION ON A NUMBER LINE activity.  You can change how big the numbers are that you have to subtract and you can actually see the jumps. [Remember to click on the padlock to allow Flash player…if you need to…then click on Reload.]

You can also watch a couple of videos I made of this lesson, using an Empty Numberline to count on and count back to subtract.  You can find it on Dolphinkids by following these instructions:

This makes subtraction SO EASY!  🙂

Let me know how you go.

Mrs Veary

SUBTRACTION USING THE EMPTY NUMBERLINE

This activity will show you how you can count on to find the answer to a subtraction sum.  Then you can play the game on your own at home.

Using the empty numberline you need to count on from the smallest number.  Add the numbers together to find the answer.  Convict Count On

Use your Empty Numberline to help show the steps.   Can you explain why we are adding to work out a take away sum?