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RanaA5515
15.11.2019 •
Mathematics
Use compatible numbers to find two estimates that quote it is between 1,624÷3
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Ответ:
A number is divisible by 3 it the sum of its digits is divisible by 3. In this case, we have
which is not divisible by 3. The nearest multiples of 3 are 1623 and 1626. If you divide these numbers by 3, you have
So, the result of our division is between 541 and 542.
If these numbers are too complex to divide, we have to choose easier numbers, but we will lose some accuracy. For example, we can see that 1624 is between 1500 and 1650, which are very easily divisible by 3. We have
So, the result of our division is between 500 and 550. This is still true, but as you can see it is a much looser approximation than the one before.
Ответ:
(5+3)^2
Evaluate the potencial
=9x62-144
Multiplícate 9x62
=576
Subtract 144 from 576
=432