That means multiply it by 2. If your tens digit is 3, your ones digit is 6.
Practice!
Here are two examples
2*10=20
Mental math like if 12 into 72 it will not be a double digit if you divide 100 by 10 it will be double digits. Most times if you have a tripple digit number and divide it by double digit the answer will be a double digit.
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.
To multiply two digit numbers, multiply each place value of a factor by each place value digit and add the results.
That means multiply it by 2. If your tens digit is 3, your ones digit is 6.
Practice!
Here are two examples
2*10=20
99*99=9801
Mental math like if 12 into 72 it will not be a double digit if you divide 100 by 10 it will be double digits. Most times if you have a tripple digit number and divide it by double digit the answer will be a double digit.
That is correct. Considering the largest double digit whole number is 99. Unless of course, you mean adding the two digits of a double digit number alongside the two digits of another double digit number, then yes, you will have a 4 digit number. Depends how you interpret the question, and your creativity.
13
Sometimes we call multiplying by two doubling. If we double a payment or a recipe, we multiply by two.
Double