Look at the following exercise and determine the correct place of the decimal point:
We have hundreds of course questions with personalized recommendations + Account 100% premium
Look at the following exercise and determine the correct place of the decimal point:
In the number -3.5, there is one digit after the decimal point: 5.
In the number 2.4, there is one digit after the decimal point: 4.
In other words, we have two digits after the decimal point.
Therefore we will move the decimal point two places to the left to get our answer: 8.40.
\( 0.1 \times 0.008 = \)
When multiplying decimals, the total decimal places in your answer equals the sum of decimal places in both factors. has 1 place, has 1 place, so your answer needs 1 + 1 = 2 places.
You'll get an answer that's way too big! For example, getting 840 instead of 8.40 means your answer is 100 times larger than it should be. Always double-check by estimating.
Use estimation! Round to . Since 8.40 is close to 8, it's correct. If you got 84.0 or 0.84, those are too far from your estimate!
Yes, always left! When you multiply whole numbers first (like 35 × 24 = 840), you get a bigger number. Moving the decimal left makes it smaller to match the original decimal factors.
Whole numbers like 5 actually have an invisible decimal: 5.0. So has 0 + 1 = 1 total decimal place in the answer.
Get unlimited access to all 18 Decimal Fractions - Advanced questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime