What strategy can you use to determine if a two-digit number is a multiple of a one digit number?

multiplication
There are two main methods of multiplication for finding the product, or answer, of a two-digit number and a one-digit number. The traditional multiplication method involves writing the numbers vertically and lining them up by place value.

What happens when you multiply a 2 digit number by 10?

But there’s another way to find our missing number. And that’s to use what we know about what happens to numbers when they’re multiplied by 10. We know that when a number is multiplied by 10, each of its digits becomes worth 10 times as large as it did before. The digit two in our answer has a value of two 10s or 20.

How do you do double digit multiplication problems?

How to Multiply Double Digits: Using the Formal Algorithm

1. Step One: Line Up All the Digits. First, line up all of the numbers according to their place value.
2. Step Two: Multiply by the Ones Digit.
3. Step Three: Add a Zero Place Holder.
4. Step Four: Multiply by the Tens Digit.
5. Step Five: Add the Two Answer Rows Together.

How do you multiply by two digits?

The number of leading zeros is always the same as the number of digits in the multiplier, so in multiplying 2 digit numbers, we always add 2 leading zeros. The next thing is we multiply the two unit digits together. Step 2. This step involves multiplying the tens digit of one number with the units digit of the other.

What are the strategies for multiplication?

Multiplication Strategies. Five multiplication strategies that I use when teaching multiplication include; equal groups or grouping, arrays, repeated addition, skip counting, or number lines. Multiplication by Grouping. The first multiplication strategy is learning multiplication by grouping is the process of separating objects into equal groups.

How do you multiply two numbers?

Here’s how to multiply two numbers that are in scientific notation: 1. Multiply the two decimal parts of the numbers. 2. Multiply the two exponential parts by adding their exponents. 3. Write the answer as the product of the numbers you found in Steps 1 and 2.

What is two digit multiplication?

Two-Digit multiplication is a natural place to start after students have mastered their multiplication facts. The concept of multiplying two-digit numbers requires a knowledge of place and place value, especially if students are to fully understand what they are accomplishing with the various strategies they use.