Question
upstudy study bank question image url

Find (1) If \( 31 \times 25=775 \), then \( 0.31 \times 2.5=\ldots \ldots \) (2) Fifth of \( 15=\ldots \ldots \ldots . \).

Ask by Lowe Klein. in Egypt
Mar 08,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

1. \(0.31 \times 2.5 = 0.775\) 2. خامس 15 = 3

Solution

Sign in to Unlock Answers for Free!

A Learning Platform Trusted by Millions of Real Students and Teachers.

star-icon Unlock

Answered by UpStudy AI and reviewed by a Professional Tutor

Extra Insights

To start, since \( 31 \times 25 = 775 \), you can shift the decimal points to find \( 0.31 \times 2.5 \). Notice that if you multiply \( 0.31 \) by \( 2.5 \), you are effectively scaling down \( 31 \times 25 \) by a factor of \( 10 \) for each decimal point movement. So, \( 0.31 \times 2.5 = \frac{775}{100} = 7.75 \). Next up, what is a fifth of \( 15 \)? To find this, simply divide \( 15 \) by \( 5 \). So, \( \frac{15}{5} = 3 \). Therefore, a fifth of \( 15 \) is \( 3 \).

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy