0
Let x = abc be a 3-digit number. The expanded for of x is 100*a + 10*b + c.And let y = de = 10*d + e be a 2-digit number.
Then x*y =
1000*a*d + 100*a*e + 100*b*d + 10*b*e + 10*c*d + c*e
= 1000*a*d + 100*(a*e + b*d) + 10*(b*e + c*d) + c*e.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
How do you multiply two-digit numbers in your head?
Practice!
When you multiply 5 the ones digit in the product is one of these two numbers Name the numbers Explain how you know?
15
How many three digit numbers are there with zero at tens place?
there are no 3 digit tis two digit! :) * * * * * 90 of them.
What are two three digit numbers the tens digit is half the hundreds digit and the ones digit is half the tens digit?
421 and 842
How many digits can the product of two 2-digits numbers have?
It can have one . . . 1.0 x 1.0 = 1 It can have two . . . 1.0 x 0.1 = 0.1 It can have three . . . 10 x 10 = 100 It can have four . . . 99 x 99 = 9801 and .01 x .01 = .0001
How do you multiply by two-digit numbers?
To multiply two digit numbers, multiply each place value of a factor by each place value digit and add the results.
How do you multiply a three-digit number by a two-digit number?
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.
How do you multiply two-digit numbers in your head?
Practice!
What is the largest product you can get when you multiply two two digit numbers?
99*99=9801
How do you multiply two-digit numbers in a decimal?
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.
How many three digit whole numbers are there?
There are only 999 three digit whole numbers.
When you multiply 5 the ones digit in the product is one of these two numbers Name the numbers Explain how you know?
15
How many three digit numbers are there with zero at tens place?
there are no 3 digit tis two digit! :) * * * * * 90 of them.
What are two three digit numbers the tens digit is half the hundreds digit and the ones digit is half the tens digit?
421 and 842
6 digit combination from 1 to 42?
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.
What is the sum of the three largest two-digit prime numbers?
269
What if the largest period 52 million does not have three numbers is it still a digit Example 52355500 IS this a two digit number or three?
52,355,500 is an eight-digit number.
