What help you. To find the product of 3-digit number and a 1-digit number you can multiply the ones multiply the tens multiply the hundreds and find the sum of each what

To find the product of a 3-digit number and a 1-digit number, you can use the method of multiplication by breaking down the numbers into their place values.

Here is a step-by-step explanation of how to do it:

1. Let's say the 3-digit number is represented as ABC, where A represents the hundreds digit, B represents the tens digit, and C represents the ones digit.

2. Multiply the ones digits of both numbers. This will give you the product of C multiplied by the 1-digit number.

3. Multiply the tens digits of both numbers. This will give you the product of B multiplied by the 1-digit number.

4. Multiply the hundreds digit of the 3-digit number by the 1-digit number. This will give you the product of A multiplied by the 1-digit number.

5. Add up the three products you obtained in steps 2, 3, and 4. This will give you the final product of the 3-digit number and the 1-digit number.

For example, let's take the 3-digit number 123 and the 1-digit number 5:

1. The 1-digit number is 5, and the 3-digit number is 123, so we break it down as A=1, B=2, and C=3.

2. Multiply the ones digits: 3 (C) multiplied by 5 equals 15.

3. Multiply the tens digits: 2 (B) multiplied by 5 equals 10.

4. Multiply the hundreds digit: 1 (A) multiplied by 5 equals 5.

5. Add up the products: 15 (from step 2) + 10 (from step 3) + 5 (from step 4) equals 30.

So, the product of 123 and 5 is 30.

By using this method, you can find the product of any 3-digit number and a 1-digit number.