Multiply Decimals by Whole Tens Game
 
The best way to get good at multiplying decimals by whole tens to do it often. This Multiply Decimals by Whole Tens Game is an interactive and engaging web-based application designed to help users practice and improve their skills.
 
Multiplying a decimal by a whole tens (like 10, 20, 30, or 40) combines two math skills: decimal multiplication and a simple shortcut of moving the decimal point. Scroll down the page for a more detailed explanation.
 
This Multiply Decimals by Whole Tens Game has an optional 60-second timer, encouraging players to solve the problems quickly and efficiently.
 

Multiplying by Whole Tens

Practice multiplying decimals by multiples of 10.

Enable 60-Second Timer

Start Game

Multiplying by Tens

Time: 60

Score: 0 / 0

1.23 × 40

Check Next

Back to Menu

 

How to Play the Multiply Decimals by Whole Tens Game
This game is designed to help you practice your order of operations skills in a fun environment.
Here’s how to play:

1. Timed Option: Check the timer if you want to enable the 60 second timer. Click “Start Game”.
   
2. Look at the Problem: You’ll see numbers at the top of the box. Your goal is to multiply them. Try to use the shortcut.
   
3. Enter Your Answer: Type your answer into the box with the question mark ?.
   
4. Check Your Work: Click the Check button (or press the Enter key). The game will tell you if you’re correct. If you are wrong, you will be shown the correct answer.
   
5. Get a New Problem: Click the Next button (or press Enter again) for a new problem.
   Your score is tracked at the top, showing how many you’ve gotten right out of the total you’ve tried.
6. Back to Menu Click “Back to Menu” to restart the game.
    
   

How to multiply decimals by whole tens

Multiplying a decimal by a whole number, like 10, 20, 30, or 40, combines two math skills: decimal multiplication and a simple shortcut. You can do this in two simple steps.
 
Step 1: Multiply the Numbers without the Decimal
First, ignore the decimal point for a moment and multiply the numbers as if they were whole numbers.
Example: To multiply 3.4×20:
Ignore the decimal in 3.4, making it 34.
Multiply 34×20.
This is the same as 34×2 with a zero at the end: 34×2=68.
Add the zero back on: 680.
So, the product of 34×20 is 680.
Step 2: Place the Decimal Point
Now, you need to put the decimal point back into your answer. The number of decimal places in your final answer must match the number of decimal places in the original decimal number.
The original number, 3.4, has one decimal place.
Take your answer from Step 1, 680, and place the decimal point so it has one decimal place.
Start from the right side of the number and move one place to the left.
680.0 becomes 68.0, or just 68.
So, 3.4×20=68.
 

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