How do you solve (- 4) + ( - 4) + ( - 4) + ( - 4) + ( - 4)?
3 Answers
Explanation:
Adding a negative number is the equivalent of
#color(blue)"subtraction"# Hence
#+(-4)=-4larr" subtract 4"# The problem with this type of calculation is that the - sign denotes both negative numbers and subtraction.
The first term in the above sum is (- 4) which represents negative 4 while the other terms
#+(-4)" represent subtract 4"# Rewriting the above sum to get.
#-4-4-4-4-4=-20#
Multiplication is the short cut for repeated addition.
Explanation:
Multiplication is the short cut for repeated addition.
Instead of
The sum of
The product of
In the same way
can be written as
=
Explanation:
One way of thinking about add and subtract is
Add is 'put with'
Subtract is 'remove from'
So in this question we have put together a lot of remove from's
This 'boils down to nothing but 'remove from'
So we have:
5 lots of remove 4
Thus: