Maths 9 - Subtracting 10 from a 2 digit number

Today we are following on from last week's Maths Mania video. We are looking at subtracting 10 from any 2 digit number. 

Watch the video to find out more! 

I wonder if you can answer these questions! 

1. 99-10=
2. 87-10=
3. 78-10=
4. 64-10=
5. 56-10=
6. 43-10=
7. 35-10=
8. 21-10=
9. 12-10=
10. 90-10=

Here is a 100 square in case you need it!