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3 years ago

Multiply and Divide Whole Numbers explain what to do and how to do it

2 answers:

8 0

Multiplication is a simple way of adding
For example 6x8 is the same as 8+8+8+8+8+8

Any number multiplied by 1 is itself E.g 4x1 = 4

Multiplying by 2 is just doubling

Multiplying by 10 is adding a 0 to the original number

If it is a big number that you do not know how to multiply mentally split it up
E.g 17x13
Split 13 into 10 and 3
17x10= 170
17x3= 51
Then add these numbers
221

If you ever get stuck, use the long method, add them instead, you will get to the right answer but it will take longer

Dividing is not as simple
Like multiplication dividing by one will leave you with the same answer

Dividing by two means you half the number, which may give you a decimal

Bigger numbers are trickier, and you may be allowed to use a calculator for numbers
Below are a number of links, these websites will teach you how to improve your multiplication and division skills:

http://www.bbc.co.uk/schools/gcsebitesize/maths/number/decimalsrev3.shtml

https://m.youtube.com/watch?v=XiXeu9FxAcQ

https://www.tutorialspoint.com/multiply_and_divide_whole_numbers/multiplication_as_repeated_addition.htm

alexandr402 [8]3 years ago

4 0

Multiplication:
It is like addition. For example, 1+1+1+1 is the same thing as 1 x 4, but multiplying is faster.

Division:
It is the opposite of multiplication. For example, 12/4=__. All you need to know is what times 4 equals 12, and the answer to that is 3. So the answer is 3.

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Which of the following expressions is not equivalent to 14?

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Answer:

in my opition is 2x(-7)

Step-by-step explanation:

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3 years ago

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P(0,-1) that is parallel to the line y= -2x+3

Mandarinka [93]

Answer:

y=2x+3

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3 years ago

State for me GENERAL FORMULA in mathematics

Ann [662]

Answer:

"General Formulas" in mathematics is the general equation you can use for certain things, by just adding the numbers given to the equation so that you can solve the problem.

Form example:

The general formula to find the y-intercept: y=mx+b

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3 years ago

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blanca buys 2 gallons of green paint. She uses 5 quarts to paint her front and 1/2 quart to paint the front porch swing

sukhopar [10]

Paint unused is 0.625 gallons.

<u>Step-by-step explanation:</u>

Quantity of green paint bought = 2 gallons

Now we have to convert gallons to quarts using the conversion factor

1 gallon = 4 quarts

2 gallons = 2 × 4 quarts = 8 quarts

Usage of paint her front = 5 quarts

Usage of paint the front porch swing = $$\frac{1}{2}$ quart = 0.5 quart

So used paint = 5 + 0.5 = 5.5 quarts

To find the unused paint, we have to subtract the used quantity from already bought.

Unused paint = 8 quarts - (5.5 quarts) = 2.5 quarts.

So Unused green paint is 2.5 quarts or 0.625 gallons.

3 0

3 years ago

quadrilateral WXYZ is reflected across the line y=x to create quadrilateral W’X’Y’Z'. What are the coordinates of quadrilateral

rosijanka [135]

Explanation

We are required to determine the coordinates of W’X’Y’Z' when WXYZ is reflected across the line y = x.

This is achieved thus:

From the image, we can deduce the following:

$\begin{gathered} W(-7,3) \\ X(-5,6) \\ Y(-3,7) \\ Z(-2,3) \end{gathered}$

We know that the following reflection rules exist:

Therefore, we have:

$\begin{gathered} (x,y)\to(y,x) \\ W(-7,3)\to W^{\prime}(3,-7) \\ X(-5,6)\to X^{\prime}(6,-5) \\ Y(-3,7)\to Y^{\prime}(7,-3) \\ Z(-2,3)\to Z^{\prime}(3,-2) \end{gathered}$

Hence, the answers are:

$\begin{gathered} \begin{equation*} W^{\prime}(3,-7) \end{equation*} \\ \begin{equation*} X^{\prime}(6,-5) \end{equation*} \\ \begin{equation*} Y^{\prime}(7,-3) \end{equation*} \\ \begin{equation*} Z^{\prime}(3,-2) \end{equation*} \end{gathered}$

This is shown in the graph bwlow for further undertanding:

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1 year ago