The question "what is 20x10" is asking how many units are in 10 groups of 20. Another way of looking at it is if I had a pile of 20 oranges plus another 9 piles of 20 oranges, how many are there in total?

Well, I could simple add up the 20 oranges 10 times, or I could be smart and use the multiplication table. There's a simple rule with double digits that end in 0 and that is to always include each 0.

So looking at the multiplication set-up we get this:

20

x10

---------

?

The next step is to multiply 0x0 which is 0, then 2x0 which is 0 again. It looks like this:

20

x10

---------

00

The next step is to multiply the 1x0 which is 0 and then the 1x2 which we know is 2. It looks like this:

20

x10

---------

00

20

Now we add the two columns together and you get 200.

Another easy way to do this sum is to multiple the 2x1 and add on the two 0s because of the rule I mentioned earlier. That way you still get 200 and it's much easier to do in your head.

Easiest way to solve this multiplication problem is, any number that is multiplied by 10, just simply add a zero. for example 3 x 10 is 30. your adding a 0 to 3. So for 20 x 10. Add a 0 to 20, and that becomes 200.

Therefore 20 x 10= 200.

Follow this procedure for multiplying numbers by 100,1000, or even 10,000.

remember multiplying 10 is one zero

multiplying 100 is two zeroes

multiplying 1000 is three zeroes

ETC...

20 x 10 = 200

In multiplication with double-digit numbers you start with the bottom right digit and multiply it with each digit in the top number. Then you write a '0' below the number you get and then you take the second digit of the bottom number and multiply that with the digits in the top number. Then you just add them together.

Hence:

20

x 10

--------

00

+ 200

---------

200

The equation 20 x 10 is 200.

One easy a quick trick when multiplying anything by ten is simply add a zero next to the number you are multiplying it by.

Here are a few examples:

253 x 10 is 2,530

547 x 10 is 5,470

132.5 x 10 is 1,325

When a decimal is in the number just move the decimal over by one to the right.

Thank you for your question.

20 x 10 = 200. You can do it mentally--just multiply 2 x 1, which is 2, and add the two zeros from that 20 and 10.

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