MATH WITH THE OTTER By:Madison and Catalina

Rad Rounding Rounding is fun! When you round, you can round to different place values such as the ones place,tens place,hundreds place, thousands place, etc. Two of the rounding "rules" are: If the underlined value is 4 or less, keep the underlined number the same,and turn the rest of the numbers to the right of the underlined number to zeros. The second "rule" is:If the underlined value is 5 or greater, add one to the value of the underlined number. Examples Rule 1: if the underlined number is 4 or less, keep the underlined number the same: 54,326 = 50,000 Rule 2: if the underlined value is 5 or greater, add one to the value: 87,341 = 90,000

Fantastic Fact Families Fact families are facts that are related to other facts. For instance, here is a fact family: 3x7=21, 7x3=21, 21 ÷ 3=7, 21 ÷ 7=3 Fact families can be used with addition and subtraction, or with multiplication and division, which is more commonly used in the O- zone. With our Fact of the Day we have worked on fact families such as 5x3=15, 5x4=20, 5x5=25, and 3x3=9.

Playing Around With Place Value Place value is the value assigned to each place value. For example, in the number: 5,342 The 5 is in the thousands place, 3 is in the hundreds place, 4 is in the tens place, and 2 is in the ones place. Place value is important when using any computation because if you line numbers up in the wrong place value your results will end up being different then they should have ended up.

Caring about Comparing Comparing numbers is when you find the difference of value with 2 or more values. We used cards and dice to figure out who out of a group of 2 had a larger/ smaller value the their opponent. Comparing numbers are important for example because when you need to find the better value of a object, such as the fact that parents sometimes will look for the less expensive item rather then the more expensive.

Victorious Values Values are what a number is worth. For instance, if you have a number such as: 9,873,621 then the value of the 9 is nine million, the 8 is eight hundred thousand, the 7 is seventy thousand, the 3 three thousand, the 6 is six hundred, the 2 is 20, and the 1 is one. We learned this in class by using large flash cards that people would hold up and Mr.Otterson would call on somebody and they would say the value of that person Mr.Otterson pointed out. We used numbers from the ones place all the way to the hundred billions place.