Round 'Em Numbers

The third graders have been working on rounding this week....rodeo style.  We started with a lot of number line work and talking about what decades certain numbers fell between.  For instance, if given the number 57, students would say, "57 is between 50 and 60, it is closer to 60."  Soon the students understood the "rules" for rounding.  We made an anchor chart about when to round up and when to round down.  The rope and hats made it even more fun and memorable!



Students played a rounding game of top it.  Players had to pull two cards and make a two digit number.  Then, they rounded the number to the 10s place.  They compared their number to the opposing player and the greater number took all the cards.  The winner had the most cads at the end of the game. We also did some work in our math notebooks of whether numbers were to be rounded up or down.