Answer:
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Step-by-step explanation:
In preparation of yourself in having to teach numeracy, it
is best to substantiate if learning the numeracy will have benefits or
advantages, such as having to help other people or even empower them as an
adult people learning and think of ways how will this could be important to
them.
So you have
8 digits (number available) to form
3 digit numbers (number selected).
Using the formula

where a is the number of available digits, P is the permutation function and c is the number of digits to be selected.
The number of three digit numbers that can be formed =

=
336 <span>
O R</span>By using the formula

where a is the number of available digits and c is the number of digits to be selected.<span>
</span>⇒

<span>
</span>⇒

<span>
</span>⇒ Permutation =
336<span>
</span>
Answer:
1) -12 + 5 = -7 you just set it up and solve it like a regular problem and then to see if its a - or + we see what number was bigger so -12 is bigger then +5 so our answer is -7
2) 7 -3 + 15 - 2 - 3 + 6 so lets add up all the negative numbers and all the positive numbers so now we have + 28 - 8 so the we solve +28 - 8 = +20 again the sign goes with the bigger number!
Hope this helps!!! Good luck!!! ;)