3 years ago

How do you teach someone to determine prime numbers when they don't know multiplication facts?

1 answer:

4 0

Do they know how to divide?

If so, tell them to divide the number in as many ways until you go past the number

For example, if your seeing if 9 is a prime number divide 9 by ,1,2,3,4,5,6,7,8,9 and only count the whole numbers.

This sounds complicated so just teach them simple time tables

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Walter had 2/4 yard of string. He used 3/6 of it on a school project. How much string did he use?

frozen [14]

2/4 reduces to 1/2

3/6 reduces to 1/2

1/2 * 1/2 = 1/4

he used 1/4 yard of string

3 0

4 years ago

Read 2 more answers

How do I factor this trinomial? It is the question that reads as -16r^3 - 6r^2 - 18r

kirza4 [7]

<span>-16r^3 - 6r^2 - 18r = -2r(8r^2 + 3r + 9)

hope that helps</span>

5 0

3 years ago

What’s the answer to m/3-2m/5=1/5

natta225 [31]

Answer:

m = - 3

Step-by-step explanation:

$\frac{m}{3} - \frac{2m}{5} = \frac{1}{5}$

It is much easier to work with whole numbers, compared to fractions, hence one should remove the denominator of the fraction. This can be done by multiplying by the LCM (least common multiple). In this case, it is fairly obvious that the LCM of 3 and 5 is 15. Therefore multiply the entire equation by 15.

$15*\frac{m}{3} - 15*\frac{2m}{5}=15*\frac{1}{5}$