Addition And Subtraction In Year 2
In Year 2, we have been learning to add and subtract numbers in different ways.
In the first lesson of the week, we had fun learning about Four way sums, also called turn around sums, that can be made up of numbers. Four way sums mean that there are two addition sums and two subtraction sums that can be worked out.
For example:
2 + 9 = 11
9 + 2 = 11
11- 2 = 9
11 – 9 = 2
To help the students work out their sums we learnt the number facts that the answer to an addition sum is always the highest number and the first number in a subtraction sum is always the highest number.
Then we learnt about bonds of 20 or numbers that can be added or subtracted to make 20. We also calculated the answers to Four way or turn around sums with these numbers in our workbooks.
In lesson 3, we looked at how to add and subtract 10’s and how knowing bonds below 10 helps us work out sums of 10. For example, if we know 2 + 5 = 7 it is easy to work out that 20 + 50 = 70.
Lesson 4 was also very fun. The students learnt how to use a number line to add and subtract 3 or more numbers. We learnt that the answers stays the same when we add the same numbers in a different order. For example 4 + 3 + 2 = 9 and 2 + 4 + 3 = 9
During the last lesson of the week, we did a revision activity. Each student was given 3 cards. They wrote 5 sums of 20 on the first card, 5 sums of 10 on the second card and 3 train sums on the last card. We strung the cards onto some wool and tied it at the end so that the cards stayed on. Some students wanted to put the cards up like bunting in their room and some of the students wore their new sum necklace.
The students have really enjoyed learning about addition and subtraction of numbers in fun ways and have certainly learnt a lot during these lessons.
Bronwen Nuthall
Year 2 Teacher
Read More
Super Sums In Reception
In Reception, the students have been learning how to write addition and subtraction sums. Leading up to learning to write sums, the students learnt about more and less. We practised finding numbers that are more or less than a given number using a number line. The concept of ‘one more’ helps students understand that numbers can be increased or added to, to make them bigger. ‘One less than’ teaches students that numbers can be decreased to make them smaller.
The students were introduced to Mr Plus using an online video lesson on Google Classroom. Mr Plus is a very friendly fellow who drives a big red bus. He always wants to add the numbers together so they can play together in a bigger group. So he puts the numbers together to make his sums. The students started out with picture sums. They also practised making sums in fun ways with games, dice, dominoes and play dough mats. The students then progressed to working out sums by drawing their own pictures above the number. They were taught to count on when adding the numbers together. The students had a lot of fun trying to write their own sums on a whiteboard. Addition sums were also practised on worksheets at home and during focus group lessons with their teachers via Zoom.
Last week the students were introduced to Minnie Minus. He is friends with Mr Plus and all the numbers, but the numbers have to keep a close eye on him, because he is always taking away. The numbers taught him to always ask permission to take away from the bigger numbers. This made everyone in Number Land much happier.
The students have started off with picture sums. They are learning that the pictures refer to the first number in a subtraction sum. The second number shows how many to take away and the answer is what is left over. These sums have been practised again this week by following online videos on Google Classroom and during their focus groups on Zoom with their teachers.
The students are extremely excited and proud to be writing their own sums and this is really evident in their smiling faces when sharing their work on Google Classroom. We look forward to having a lot more fun learning about our super sums.
Bronwen Nuthall
Reception Teacher
