Wednesday, November 21, 2012

Math Riddles (am)

Today in math class, we expanded our discussion about place value to include decimal numbers. We talked about how each column in the place value chart is separated by one power of ten. By looking at these concepts in terms of money, the tenths column would represent dimes (since one dime makes up one tenth of a dollar) and the hundredths column would represent pennies (since one penny makes up one hundredth of a dollar).
We also complete a math riddle in which the students had to use four clues to determine a mystery number.

The clues given included:
- The digit in the hundredths place is double the digit in the tenths place
- The digit in the tenths place is odd
- The digit in the thousandths place is the sum of the digits in the tenths place and the hundredths place
- The digit in the ones place is four times the digit in the hundredths place.

Students worked in class to develop their own riddles. I am asking that each student submit their own riddle for tomorrow's class. Many students have completed this but those that haven't must complete this at home.