This "secret message" activity will amuse your students and teach them about estimating with decimals, including all 4 operations. Students need to first decide which operation is appropriate. Then they solve the problem, and compare it to the estimated answer.
Directions: Can you decode the message? In each row, read the problem to determine the correct operation. Then, solve the problem and record your answer. Use estimation to check that your answer makes sense. Which is greater, the actual answer or the estimated answer? Circle the letter next to the greater answer in each row. The first one has been completed for you.
At the end, read the message from top to bottom. (They are given a hint: Why do decimals always win arguments?) It reads, because they "make good points." (The other letters spell "Just repeat a lot.")
And all you have to do is copy it! The prep is all done for you. It's easy to check. Just see if they found the secret message! It's up to you to determine how much work you require your students to show. Use it as group work, homework, enrichment, or extra practice.
You can get this activity and 12 more in the Secret Message Math Bundle. Check it out! You save over 50% by buying the bundle.
Thanks, and enjoy!