How do you work this out in maths?

[MoSalahsBeard]

My son is stuck on question 1…

And this as well!

BODMAS - division first so square root of 8, then square root of 2 and multiply the 2 answers together.

Is it 8x2 and then work out the square root of that

So 4

Wait for someone better to come along tho

Second one he needs to work out what's missing from the boxes so he needs to work out the difference between the equations and that will tell him what should be filled in along top row and then how to answer the other missing ones

Root 8 x root 2 is root 8x2 so root 16 ie 4.

Square route of 8 multiplied by the square route of 2.

What you need to do is multiply the two numbers together (without doing anything to them) then square route that, in this case it is 8x2 = 16, then square route of 16 is 4

The table do any rows or columns that have 3 entries already. Keep going until all done.

Root 32 is root 16x2 which is root 16 x root 2 which is 4root2.

But how do you do them? How do you work it out?

(root x) times (root y) is always equal to root (x times y) for any x and y.

So (root 8) times (root 2) is equal to (root 16) which is 4.

Square root of 8 is 2.82. Square root of 2 is 1.41. Multiply these two numbers give you the answer.
Square number is the number multiplied by itself.
Square root is a number when multiplied by itself gives the actual number

Top left box is 1/4

How do you know? If I can understand how to work this box thing out I can help him

It's addition.
So 1/8 plus 1/3 is 11/24
Then 1/2-1/8 is 3/8 along the top row.

I was wrong you don't need 3 in a row/column only 2 out of the 3 anywhere.

1/4 add 1/2 equals 3/4

and do this to complete the gaps….

The fractions need to have the same bottom numbers(denominator) before you can add them. So you have to make equivalent fractions. Eg. 1/2 = 2/4=3/6

3/4-1/2 = 3/4-2/4= 1/4 in first top box
ie. Find common denominator to complete a sum with two of the three fractions you know.

So bottom left is: 9/20

1/4 add 1/5 which equals 5/20 add 4/20 which is 9/20

Top middle is 3/8….

1/8 add 3/8 equals 4/8 which equals 1/2

And so on….good luck

Where one fraction from the top row, meets a fraction from the side the box is empty as they need adding together.

How old is your so?"Pass functional skills" is a free basic website I use to teach it has videos, questions and answers and shows how to work out if you get a question wrong.

Sq root of 8 mult by sq root of 2 is 4
Sq root of 8 is 2.82

You don't need to know root 8.

OP. If your DC is doing surds, presumably they know how to add and subtract fractions.

I think on the squares the top one you need to know what value makes 5/6 so 1/2+3/4 =4/6 so it would be 1/6?

i was shite at maths though.