Today we have been reminding ourselves all about how we can use jottings to add and subtract 2 and 3 digit numbers. We had number cards, we chose our own numbers and added them together, then we swapped them around and subtracted them.
Can you remember which number goes first in a subtraction calculation?
What do you need to draw to help you work out a subtraction calculation?
When we are adding what do we do to the numbers to make them easier to work with?
That’s right Jessica! Well done! Why do we partition numbers? How does it help us?
We partition a number so it break it down into 10s and units.
Yes we do Jack, it makes really big numbers easier to work with.
Wow… I must say Y2 that I am very impressed with your maths skills!
Keep it up!
They’re doing really well Miss Crookes! I’m very proud of them all.
When you do an add sum the biggest number always goes first
We partition the numbers to make them easier to work with.
Yesterday we worked really hard we did subtractions, first we made a number line and then we partitioned the smallest number and counted back on our number line .
First we partitioned our number and drew a number line then we took off the jumps of ten, then the jumps of ones and got our answer.
The biggest number goes first wen we do a subtraction problem because if you do take away then it will go to 0.
The biggest number always goes first in a subtraction.
We used a number line and we partitioned the smallest number and then we jumped back on the number line.
we know 50-15=45 50+15=65
I liked partitioning 58+60=118
I found out that when we do subtracting the big number alwas gos first.
I liked subtracting 60 -10
In a subtraction the biggest number goes first & if you have a big number you need a number line to help you.
I love working with Jessica because we did lots of different types of sums and my favourite things are good at helping me to work harder and harder and they make me think better.
Well done you lot! You obviously know a lot about adding and subtracting.
I love doing 3 digits because they are easy and 2 digits are easy too.
Well done year two I only found that out a few years ago so uppo duppo
When you do a hard sum partition the number to help you work out the answer.
The big number goes first and the little number goes second.
If your doing a subtraction you need a number line and you put the biggest number first
90 goes first because it is the biggest number and you need to draw a number line and partion.
The biggest number goes at the beginning all the time in subtractions!
We use number lines to work out the subtractions.
You partition the number to work out additions.
The biggest number goes first in a subtraction!
You always need a number line when you are subtracting .
We need to partition it when we are adding.
Jessica f
The biggest number all ways go’s first in subtractions .
You need to draw a number line.
You partition them.