Some of us have been working hard to learn the numbers that add to 10. We need to know them as quick as a flick. These include: 2+8, 4+6, 7+3, etc. If we know these basic facts, we can use them to add and subtract numbers easily, without counting. For example, if we know 4+6=10, we can use that basic fact to help us know 40+60=100 (4 tens + 6 tens = 10 tens). Today the Circles used their knowledge of numbers that add to 10, to quickly add together three numbers WITHOUT COUNTING. The idea was to find the compatible numbers - the two numbers that added together to make 10. Then the Circles needed to use their knowledge of teen numbers to add on the third number WITHOUT COUNTING, and find the answer. We found that we could add these 3 numbers really, really quickly! We had to work it out quickly because Mrs T "drove" the "train" of numbers into the "train station" where we couldn't see it. We practised explaining our maths workings to each other (you can see Irene doing this in the video below), and also writing down the number sentence that showed how we worked it out (you can see Niamh and Tavita's workings in the photos).
4 Comments
Sam King
6/5/2018 10:35:10 am
Well done Irene, you are good at maths!
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Lindsey
14/5/2018 08:25:00 pm
You really know your adding up to tens. Well done Irene
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Ethan
29/5/2019 07:07:58 pm
I think iwanto no how the ather kids in your class woork out the ansawer
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kees
13/6/2019 04:55:01 pm
well done irene
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