Presentation on theme: "Getting Ready: Addition and Subtraction Concepts by: Nicole Lamons"— Presentation transcript:
1Getting Ready: Addition and Subtraction Concepts by: Nicole Lamons
2Fact FamilyA fact family is a set of related addition and subtraction facts.5+7=127+5=1212-7=512-5=7
3Inverse OperationsFact Families are examples of inverse operations. Inverse operations are operations that undo each other, such as addition and subtraction.4+7=117+4=1111-7=411-4=7
4Order Property of Addition You can add two or more numbers in the same order and get the same sum.7+4=114+7=116+11=1711+6=17=
5Identity Property of Addition When you add zero to a number, the sum is that number12+0=1211+0=119+0=930+0=30
6Grouping Property of Addition You can group addends in different ways and still get the same sumThe ( ) symbols tell you which numbers to add firstRemember to add the numbers in ( ) first(9+1) + 4= 9 + (1+4)=14 =148 + (1 +9)== 18
7In SummaryWe have completed our study on chapter 1. We have learned all about fact families, inverse operations, order property of addition, identity property of addition, and the grouping property of addition. Now let’s review what we learned. Turn to page 14 for extra practice.