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Mulitplying is really just a form of addition. Multiplying by 2 is the same as adding a number to itself (or adding doubles). For example:

4X2 is the same as 4 + 4 = 8

The X2 part of the multiplication problem means that you are adding doubles or 4 to itself. So any problem with X2 would be the same as adding doubles:

5X2 = 5 + 5 = 10

6X2 = 6 + 6 = 12

7X2 = 7 + 7 = 14

...and so on.

So if you can add doubles you already know how to multiply any number by 2.

Q: How can adding doubles can help you to multiply by 2 give an example?

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For example: -2*2 = -4

You multiply the number of meters by 100.

How about: 4*6 = 24 as one example

You flip it to a fraction

Multiply 3 times 25 mentally (the answer is 75), and then adding three zeroes will give the total of 75,000.

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Adding zero to a number will give you the same number. Example: 5 + 0 = 0

For example: -2*2 = -4

You multiply the number of meters by 100.

add , subtract, multiply, fraction,

How about: 4*6 = 24 as one example

You flip it to a fraction

Multiply 3 times 25 mentally (the answer is 75), and then adding three zeroes will give the total of 75,000.

What you do with them is this i am going to give you an example: if you had 2 with the exponet 4 this is what you do: 2x2x2x2 and that would equal 8

You don't multiply by the second number, you multiply by the recipricol. For example, 5/8 divided by 3/5... you multiply 5/8 by 5/3. Which would give you 25/24ths, or 1 and 1/24.

There are many possible combinations that multiply to 145, but one example is 29*5.

When you multiply an odd number by an even number, you are essentially adding an even number of odd numbers together. Since adding an even number of odd numbers will always result in an even number, the product will be even.

For example.. if you got 25 out of 30 on your test then take 25 and divide by 30 and multiply by 100 which will then give you your percentage.