  # Kentucky - Grade 1 - Math - Numbers and Operations in Base Ten - Adding Within 100 - KY.1.NBT.4

### Description

Add within 100 including adding a two-digit number and a one-digit number. Add a two-digit number and a multiple of 10. a. Add within 100 using… • concrete models or drawings; • strategies based on place value; • properties of operations; • the relationship between addition and subtraction. b. Relate the addition strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

• State - Kentucky
• Standard ID - KY.1.NBT.4
• Subjects - Math Common Core

### Keywords

• Math
• Numbers and Operations in Base Ten

## More Kentucky Topics Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, by using objects, drawings and equations with a symbol for one unknown number to represent the problem. Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart and comparing, with unknowns in all positions. Apply properties of operations as strategies to add and subtract. Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.

## Here is the skill that Kentucky requires you to master

• State Test K-PREP
• State Standards Kentucky Core Academic Standards
• Subject Math
• Topic Name Adding Within 100
• Standard ID KY.1.NBT.4
• Description
Add within 100 including adding a two-digit number and a one-digit number. Add a two-digit number and a multiple of 10. a. Add within 100 using… • concrete models or drawings; • strategies based on place value; • properties of operations; • the relationship between addition and subtraction. b. Relate the addition strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.  