Is the sum of 425 and 390 less than or greater than 800. How do you know?
400 + 400 = 800
What do you think the answer to this problem is?
Less than
To determine if the sum of 425 and 390 is less than or greater than 800, you need to add the two numbers together and compare the result to 800.
Let's add 425 and 390:
425 + 390 = 815
So the sum of 425 and 390 is 815.
Since 815 is greater than 800, we can conclude that the sum of 425 and 390 is greater than 800.