Monday's maths - 1/6/20
A top mental tip today in how to help you adding numbers in your head…
When adding 9, some of you will still put the other number in your head and count on 9. However, there is a quicker way! Have a look at this video and then try the questions attached:
https://www.youtube.com/watch?v=4GubsSgB5Zo
Basically, you add a ten and then take away 1 (as 9 is one less than ten). Adding a ten is simple, as you merely add a 1 in the tens column (see the link to place value, H T O?).