  ## Addition and Subtraction Word Problems

Use addition and subtraction within 20 to solve problems.

## Addition and Subtraction Word Problems ###### 1.RA.A.1    ## Properties of Operations

Use properties as strategies to add and subtract.

## Properties of Operations ###### 1.RA.B.5    ## Adding and Subtracting within 20

1.RA.B.6 Demonstrate that subtraction can be solved as an unknown-addend problem. 1.RA.C.7 Add and subtract within 20. 1.RA.C.8 Demonstrate fluency with addition and subtraction within 10.

## Adding and Subtracting within 20 ###### 1.RA.B.6 1.RA.B.7 1.RA.B.8    ## Number Sentences

1.RA.A.3 Develop the meaning of the equal sign and determine if equations involving addition and subtraction are true or false.

1.RA.A.4 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.

## Number Sentences ###### 1.RA.A.3 1.RA.A.4    Solve problems that call for addition of three whole numbers whose sum is within 20. ###### 1.RA.A.2    ## Tens & Ones

1.NBT.A.1 Understand that 10 can be thought of as a bundle of 10 ones – called a “ten”.

1.NBT.A.2 Understand two-digit numbers are composed of ten(s) and one(s).

## Tens & Ones ###### 1.NBT.A.1 1.NBT.A.2     ###### 1.NBT.B.5    ## Subtract Multiples of 10

Add or subtract a multiple of 10 from another two-digit number, and justify the solution.

## Subtract Multiples of 10 ###### 1.NBT.B.7    ## Mental Math

Calculate 10 more or 10 less than a given number mentally without having to count.

## Mental Math ###### 1.NBT.B.6    ## Shape Attributes

Distinguish between defining attributes versus non-defining attributes; build and draw shapes that possess defining attributes.

## Shape Attributes ###### 1.GM.A.1    ## Ordering Objects by Length

1.GM.B.5 Order three or more objects by length.

1.GM.B.6 Compare the lengths of two objects indirectly by using a third object.

## Ordering Objects by Length ###### 1.GM.B.5 1.GM.B.6    ## Tell and Write Time

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

## Tell and Write Time ###### 1.GM.C.8    ## Composite Shapes

Compose and decompose two-and three-dimensional shapes to build an understanding of part-whole relationships and the properties of the original and composite shapes.

## Composite Shapes ###### 1.GM.A.2    ## Partitioning Into Equal Shares

Partition circles and rectangles into two or four equal shares, and describe the shares and the wholes verbally.

## Partitioning Into Equal Shares ###### 1.GM.A.4    ## Length of an Object

Demonstrate the ability to measure length or distance using objects.

## Length of an Object ###### 1.GM.B.7    ## Counting to 120

1.NS.A.1 Count to 120, starting at any number less than 120.

1.NS.A.2 Read and write numerals and represent a number of objects with a written numeral.

## Counting to 120 ###### 1.NS.A.1 1.NS.A.2    ## Comparing Numbers

Compare two two-digit numbers using the symbols >, = or <.

## Comparing Numbers ###### 1.NBT.A.3    ## Interpreting Data

1.DS.A.1 Collect, organize and represent data with up to three categories.

1.DS.A.2 Draw conclusions from object graphs, picture graphs, T-charts and tallies.

## Interpreting Data ###### 1.DS.A.1 1.DS.A.2     