Thursday, October 18, 2012

Estimating Decimals and Family Fun math night

Getting ready to really understand and use decimals!  

Clustering: rounding numbers to the same value
     Example: 147, 153, and 158 can be clustered at 150, so 150 + 150 +150 = 450. 

Front End Estimation: use only the first number of the decimal number
     Example: 38.2 + 14.7, just take the first numbers and add them together 38 + 14 = at least 52. 

Rounding Rules: When the number next to the value you're rounding to is 5 or more, it increases by one.  When it is 4 or less the value stays the same. 
     Example: 56 would round to 60, but 52 would stay at 50. 

We are going to be working on adding, subtracting, multiplying, and dividing decimals over the next week of class. 

BIG NEWS! 
Family Math night will be happening on Wednesday, Oct. 24th, from 6:00 - 7:30.  It is an open house format and is intended for you to come meet the math teachers, play some math and logic games, and just have some family fun.  Please consider adding this into your busy schedules. 

More info here: Math Night Information

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