Q: How do you multiply three digit numbers by two digit numbers?

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To multiply two digit numbers, multiply each place value of a factor by each place value digit and add the results.

Multiply the three-digit number by the one's digit, or last digit, of the two-digit number. That is your first part. Now multiply by the second-to-last digit, or ten's digit, and multiply the result by 10. That is your second part. Add the two parts and that is your answer.

Practice!

99*99=9801

There are only 999 three digit whole numbers.

To multiply two digit decimal numbers, multiply the numbers as you would without the decimals. To put the decimal in the answer, count the number of decimal places in the two numbers and put the decimal in the answer that many places to the left. For example: 5.12 x 6.35 = 32.5120. If the numbers were 51.2 x 63.5, the answer would be 3251.20.

Take the smallest 2-digit number (10), and see how many digits you get when you multiply it by itself.Also, take the largest possible 2-digit number (99), and see how many digits you get when you multiply it by itself.

You put the four digit number at the top of the three digit number and you do the same thing as you would do with a two digit number with a 3 digit number.

15

there are no 3 digit tis two digit! :) * * * * * 90 of them.

421 and 842

There are 28706 such combinations. 5456 of these comprise three 2-digit numbers, 19008 comprise two 2-digit numbers and two 1-digit numbers, 4158 comprise one 2-digit number and four 1-digit numbers and 84 comprise six 1-digit numbers.

52,355,500 is an eight-digit number.

497-263

Starting at 12 and ending at 99, there are 30 two-digit numbers divisible by three.

I think that you would just add a .0 to the end of the two digit number, thus making it three digit, then divide. At the end, you have to put the decimal on the answer in the right place, though.

When you multiply two numbers, you get the product

269

198 of them.

by making them half

They are: 83, 89 and 97

You take the two numbers that you need which is the width and the height then you multiply the width and height and multiply the two numbers to find the product and that's your answer! :)

The only way to do that is something like [ 2.5 x 28 ] or [ 3.5 x 20 ]. It can't be done with whole numbers. Here's why: -- The smallest possible 2-digit whole number is 10. -- So the smallest possible product of two 2-digit whole numbers is 100. -- So it's not possible to multiply two 2-digit whole numbers and get 70 .

"Sum" requires at least two numbers. So there cannot be athree digit number that sums to anything.

There are 21 two-digit prime numbers.