Berikut adalah artikel tentang 0.42 x 0.21:
Multiplying Decimals: A Step-by-Step Guide
Multiplying decimals can seem daunting at first, but it's actually quite straightforward. Let's take a look at how to multiply 0.42 by 0.21:
1. Ignore the decimal points
Start by treating the numbers as whole numbers: 42 x 21.
2. Multiply as usual
Perform the multiplication as you would with any whole numbers:
42
x 21
----
42
840
----
882
3. Count decimal places
Now, count the total number of decimal places in the original numbers (0.42 has two decimal places, and 0.21 has two decimal places, for a total of four decimal places).
4. Place the decimal
Starting from the rightmost digit of the product (882), count four places to the left and place the decimal point. This gives us 0.0882.
Therefore, 0.42 x 0.21 = 0.0882.
Tips for multiplying decimals
- Visual aids: You can use grid paper to visualize the multiplication of decimals.
- Estimation: Before you multiply, estimate the answer. This will help you catch any major errors.
- Practice makes perfect: The more you practice multiplying decimals, the easier it will become.
