1st Grade Math (Missouri Learning Standards)

Number Sense (NS), cluster A

• 1.NS.A.1 Count to 120 starting from any number below 120.
• 1.NS.A.2 Read and write numerals and match a numeral to a set of objects.
• 1.NS.A.3 Count back from any number between 20 and 1.
• 1.NS.A.4 Skip count by 5s to 100 from any multiple of 5.

Number Sense and Operations in Base Ten (NBT), cluster A

• 1.NBT.A.1 See 10 as a bundle of ten ones called a ten.
• 1.NBT.A.2 Understand two-digit numbers as tens and ones.
• 1.NBT.A.3 Compare two-digit numbers with >, =, and <.
• 1.NBT.A.4 Count by 10s to 120 from any number.

Number Sense and Operations in Base Ten (NBT), cluster B

• 1.NBT.B.5 Add within 100.
• 1.NBT.B.6 Find 10 more or 10 less than a number in your head without counting.
• 1.NBT.B.7 Add or subtract a multiple of 10 to or from a two-digit number and explain the answer.

Relationships and Algebraic Thinking (RA), cluster A

• 1.RA.A.1 Solve problems with addition and subtraction within 20.
• 1.RA.A.2 Solve problems that add three whole numbers with a total within 20.
• 1.RA.A.3 Learn what the equal sign means and decide whether addition and subtraction equations are true.
• 1.RA.A.4 Find the missing number in an addition or subtraction equation with three numbers.

Relationships and Algebraic Thinking (RA), cluster B

• 1.RA.B.5 Use properties of operations as strategies to add and subtract.
• 1.RA.B.6 Show that subtraction can be solved by finding a missing addend.

Relationships and Algebraic Thinking (RA), cluster C

• 1.RA.C.7 Add and subtract within 20.
• 1.RA.C.8 Add and subtract fluently within 10.

Geometry and Measurement (GM), cluster A

• 1.GM.A.1 Tell defining from non-defining features and build and draw shapes with the defining ones.
• 1.GM.A.2 Combine and split flat and solid shapes to understand parts and wholes.
• 1.GM.A.3 Recognize flat and solid shapes seen from different views and turns.
• 1.GM.A.4 Split circles and rectangles into halves or quarters and describe the parts and whole aloud.

Geometry and Measurement (GM), cluster B

• 1.GM.B.5 Put three or more objects in order by length.
• 1.GM.B.6 Compare two lengths by using a third object.
• 1.GM.B.7 Measure length or distance with objects.

Geometry and Measurement (GM), cluster C

• 1.GM.C.8 Tell and write time to the hour and half hour on analog and digital clocks.
• 1.GM.C.9 Know what pennies, nickels, dimes, and quarters are worth.

Data and Statistics (DS), cluster A

• 1.DS.A.1 Collect, organize, and show data with up to three categories.
• 1.DS.A.2 Draw conclusions from tallies, T-charts, and object or picture graphs.