400 - 225 = 175
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475
10 squared is 100. 20 squared is 400. 225 is between 100 and 400. Its square root will be between 10 and 20.
To find a number that is 400 less than 3020, you subtract 400 from 3020. The calculation would be 3020 - 400 = 2620. Therefore, the number that is 400 less than 3020 is 2620.
Well, honey, comparing 300 and 225 is a piece of cake. You can see that 300 is bigger than 225 just by looking at them. If you want to get technical, you can subtract 225 from 300 to see that the difference is 75. So, in conclusion, 300 is larger than 225.
They are all perfect squares