Mrs. Rudelich's 2015-16 3rd Grade Class: September 2015

Saturday, September 19, 2015

Week of September 21-25

Going home on Monday is math Homework #5. It will be due on Friday, the 25th. Also going home is the reading page, , it will be due on Friday. The spelling and vocabulary words for Unit 1 Week 5 are going home. We will be taking the test on both spelling and vocabulary on Friday. The reading slip for September 21-27 is going home and will be due on Monday, September 28.

Topic 2 Math Vocabulary

*addends- numbers added together to give a sum Example: 7+5=12 7 and 5 are addends

*sum-the answer when adding two or more addends Example: 7+5=12 12 is the sum

*Commutative (Order) Property of Addition- numbers can be added in any order and the sum will be the same Example: 5+3=3+5

*Associative (Grouping) Property of Addition-Numbers can be grouped in any way and the sum will be the same. Example: (3+2) + 4= 5+4=9 and 3 + (2+4)= 3+6=9

*Identity (Zero) Property of Addition- the sum of zero and any number is that number. Example: 0+4=4

*difference-The answer when subtracting two numbers Example: 7-2=5 5 is the difference

*fact family- a group of related facts using the same numbers Example: (3,4,7) 3+4=7, 4+3=7, 7-4=3, 7-3=4

*round: to replace a number with another number that tells about many or how much

*estimate- to give a number or answer that tells about how many or how much

*compatible numbers- numbers that are easy to add, subtract, multiply, or divide mentally

*equation- a number sentence that uses an equals sign (=) to show that the value to its left is the same as the value to its right. Example: 6+4=10

Mrs. Rudelich's 2015-16 3rd Grade Class

Saturday, September 19, 2015

Week of September 21-25

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