Taking away within 20

For grown-ups: this lesson in words

Years 1 and 2 · Maths

Taking away within 20: I can take away and find the difference to 20.

1. Here are 8 cupcakes.

   Take 3 away.

   8 − 3 = 5

   Picture: 8 cupcakes. 3 cupcakes are crossed out, and 5 are left. 5 left.

2. Your turn: Here are 6 balloons. Take 2 away. How many are left?

   Picture: 6 balloons. 2 balloons are crossed out.

   Choose one:

   • 4
   • 5
   • 8

   Answer

   The answer: 4

   6 − 2 = 4. 4 balloons are left.

   Picture: 6 balloons. 2 balloons are crossed out, and 4 are left. 4 left.

3. Here is 13 − 4. Start on 13.

   Count back 4: 12, 11, 10, 9.

   13 − 4 = 9

   Picture: A number line from 0 to 15. A dot at 13 labelled "start". The frog hops from 13 to 12, then to 11, then to 10, then to 9.

Words to know

take away:

Take some away, then count how many are left.

count back:

Start on a number and count down, one at a time.

difference:

How many more one number is than another.

zero:

None at all. The number 0.