Secondary I • 2yr.
Im doing my homework and I’ve already asked 2 questions, but I have trouble with this:
14-(6+2)14-(6+2)=
and the number changed but its repetitive on most of all the other 99 questions like this.Like if my teacher would have pressed « copied ».
other examples:(5x2)-(3+4)(5x2)-(3+4)
☺
14-(6+2)14-(6+2)
= 14-8×14-8
= . . .
You start with the parentheses, then to remove the confusion when you have a number just next the parentheses its a multiplication su you can put the multiplication (x) once you completed it.
with the priority of operations (multiplication goes before addition)
14 - (6+2) 14 - (6+2)
14 - 8 x 14 - 8
14 - 112 - 8 = -106
(5x2)-(3+4)(5x2)-(3+4)
10 - 7 x 10 - 7
10 - 70 - 7 = -67
Order of Operations (PEMDAS)
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hi !
When there is a multiplication between a parenthesis and a number, you have to use the concept of distributivity.
You have to multiply each number of the paranthesis with the number outside. For example, \(-(6+2)14\) is the same as \(-1\times(6+2)\times14\). You can then multiply either one first.
$$ -1\times(6+2)\times14=-1\times(6\times14+2\times14) $$
I will let you try to complete the exercice and if you have other questions, feel free to ask them !