Since there's no 2.3 in the times table, we'll have to multiply one digit at a time.Īs usual, we'll solve the problem from right to left. When multiplying stacked numbers, start with the right digit on the bottom. To solve our problem, we'll use a familiar tool: the times table.
#4 x 7.2 x 6 0 how to#
Let's see how this works by solving this problem: 2.3 x 4.Ĭlick through the slideshow to learn how to multiply decimals. If you divide the large problem into a few smaller ones, it will be easier to solve. Multiplying decimal numbers is a lot like multiplying larger numbers. Solving multiplication problems with decimals Then we'll make sure the digits to the right are lined up. 4.5 has two digits.and 38.12 has four digits.ģ8.12 has more digits.
4.5 has two digits.įirst, look to see how many digits are in each number. We'll stack this expression: 4.5 x 38.12.įirst, let's look to see how many digits are in each number. When writing a stacked multiplication expression with decimal numbers, the numbers should be lined up on the right. Instead of an equals sign ( =), we'll put a line underneath the number on bottom. Since we're multiplying this number, we'll write the times sign ( X) to the left of the numbers. This means we'll write 15.60 above the 5. 15.60 has four digits.and 5 is one digit.ġ5.60 has more digits. Let's look at the number of digits in each number. It's a good habit to place the number that has the most digits on top.
We'll stack the numbers one on top of the other. Let's set up our multiplication expression: $15.60 x 5. When you multiply decimal numbers, it's helpful to set up the problem in a way that makes it easier for you to solve it one step at a time.Ĭlick through the slideshow below to learn how to set up a multiplication problem with decimals. Because all of the shirt prices are the same, multiplication could help you solve this problem a little faster. In the lesson on multiplication, we learned that when you multiply, you are increasing a number many times. Adding this many numbers could take a long time.
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