Count over the 100s boundary (1)
Sometimes quite tricky subtractions can be made easy by counting up. Have a look at these to see why.
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Count over the 100s boundary (1)
Sometimes quite tricky subtractions can be made easy by counting up. Have a look at these to see why.
![Preview of 'Count over the 100s boundary (1)'](https://content.urbrainy.com/1307/18482440/thumbnail_xlarge/1327_1.png)