# North Carolina - Grade 1 - Math - Numbers and Operations in Base Ten - Adding Within 100 - NC.1.NBT.4

### Description

Using concrete models or drawings, strategies based on place value, properties of operations, and explaining the reasoning used, add, within 100, in the following situations: • A two-digit number and a one-digit number • A two-digit number and a multiple of 10

• State - North Carolina
• Standard ID - NC.1.NBT.4
• Subjects - Math Common Core
• Grade - 1

### Keywords

• Math
• North Carolina grade 1
• Numbers and Operations in Base Ten

## More North Carolina Topics

Represent and 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 the unknown number.

Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90, explaining the reasoning, using: • Concrete models and drawings • Number lines • Strategies based on place value • Properties of operations • The relationship between addition and subtraction

Order three objects by length; compare the lengths of two objects indirectly by using a third object.

Tell and write time in hours and half-hours using analog and digital clocks.

Organize, represent, and interpret data with up to three categories. • Ask and answer questions about the total number of data points. • Ask and answer questions about how many in each category. • Ask and answer questions about how many more or less are in one category than in another.

## Here is the skill that North Carolina requires you to master

• Grade Level 1
• State Test End-of-Grade test
• State Standards North Carolina’s Standard Course of Study
• Subject Math
• Topic Name Adding Within 100
• Standard ID NC.1.NBT.4
• Description
Using concrete models or drawings, strategies based on place value, properties of operations, and explaining the reasoning used, add, within 100, in the following situations: • A two-digit number and a one-digit number • A two-digit number and a multiple of 10