what is 5[3(2+5)-5]

Ok

First add what's inside the parentheses. 

2+5=7

Now use the order of operations to find the answer.

Multiplcation

Division

Addition 

Subtraction

so, you multiply first.

3*7=21

now subtract 5 from 21

21-5=16

Multiply 16 by 5 and you get the answer.

16*5=80

So, $${\mathtt{80}}$$ Is the answer.

the answer is 78+2

This is a straight forward question.

You just need to know that if a number is followed immediately by a bracket, there is an invisable x sign between them.  

So who's correct?

Hey Dragon,

Why don't you give it a go and i will tell you if you are correct?

5(3(2+5)-5)

Ok

First add what's inside the parentheses. 

2+5=7  CORRECT

Now use the order of operations to find the answer.

Multiplcation

Division

Addition 

Subtraction

so, you multiply first.

3*7=21        CORRECT

now subtract 5 from 21

21-5=16    CORRECT

Multiply 16 by 5 and you get the answer.

16*5=80        CORRECT

So, $${\mathtt{80}}$$ Is the answer.

CORRECT  CORRECT  CORRECT  CORRECT

EXCELLENT DRAGON      

Yay! Thank you Melody!

Do I give myself 1 point? We shall build planes from your help queen!

king Arthur took out the sword that was stuck on stone, and only he could take it out.

Good job DS...I gave you some points....yep....you should always give yourself a point for a good answer....!!!!

YES I agree!