## Week 4 in prec 11

In this week, we have learned Absolute Value and Radicals, but not all , just to 2.4 Multiplying and Dividing Radical .

First , we learn how to calculate the absolute value. What even inside the absolute symbol, it come out the positive number, except a negative symbol outside. We should calculate the inside one first , after that we calculation will be more easier.

And we learned how to simpify the Radical Expressions. The key is to remember the square of the first ten natural numbers.

$1^2=1$ $2^2=4$ $3^2=9$

$4^2=16$……..,

what’s more , you can also remember the cube of them.

$1^3=1$ $2^3=8$ $3^3=27$

$4^3=64$……..