This week in math we’ve been working on understanding numbers using place value. We used whiteboards and place value pockets to practice. Mrs. Hamman gives us clues about a mystery number, and we try to figure out what the number is using those clues. By the time we get the last clue, we should all have the same number.
Once we knew how to find numbers this way, we decided to collaborate with another class. We did a video conference with Mrs. Fraher’s class. They are a group of third graders who go to a school near ours, and they have been working on place value too. They gave us clues about their mystery number and we had to guess it. Then we gave them clues while they tried to guess. It was fun to see that other kids were learning the same things we were!
Do you want to try to guess a mystery number? Here are some clues:
- It is a four-digit number.
- The number is odd.
- Three-fourths (or 75%) of the digits are odd.
- The digit in the thousands place is the number of legs on an octopus.
- The digit in the ones place is the greatest single-digit odd number.
- The digit in the hundreds place is the quotient of 10 divided by 2.
- When you add up the sum of the digits in the hundreds, tens and ones places, the sum is 21.
- The digital root of the number is 2.
Can you guess our mystery number?