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Colorado Standards

Colorado 1st Grade Math Standards

All 11 Colorado math standards for 1st grade, each explained in plain English. The official wording is in Colorado Department of Education's document, linked at the end of this page.

11 standards

Number and Quantity

3 standards
MA.1.NBT.A
Count to 120 starting from any number below it, and read, write, and use numerals to show how many objects are in a set in that range.
MA.1.NBT.B
Explain that a two-digit number is made of tens and ones, like 47 is 4 tens and 7 ones, and compare two-digit numbers using the >, =, and < symbols.
MA.1.NBT.C
Add within 100 using models and place value, find 10 more or 10 less than a two-digit number mentally, and subtract tens from tens like 80 - 30, explaining each method.

Algebra and Functions

4 standards
MA.1.OA.A
Solve addition and subtraction word problems within 20 with the unknown in any spot, including adding three numbers, using objects, drawings, and equations.
MA.1.OA.B
Use properties like switching the order or making a ten to add and subtract, and treat subtraction as finding a missing addend, like 10 - 8 as 8 + ? = 10.
MA.1.OA.C
Add and subtract within 20 using strategies like counting on, making ten, and related facts, and add and subtract within 10 quickly and accurately.
MA.1.OA.D
Decide whether addition and subtraction equations are true or false using the meaning of the equal sign, and find the missing number in equations like 7 + ? = 12.

Data, Statistics, and Probability

3 standards
MA.1.MD.A
Order three objects by length, compare two lengths using a third object, and measure length by lining up same-size units end to end with no gaps.
MA.1.MD.B
Read analog and digital clocks to the hour and half hour, and write the time shown, like 3:30.
MA.1.MD.C
Sort data into up to three categories, show it in a simple chart, and answer questions about totals, each category, and how many more or fewer one has.

Geometry

1 standard
MA.1.G.A
Tell defining features of shapes from ones like color or size, build and combine flat and solid shapes into new ones, and split circles and rectangles into halves and fourths.

The official Colorado documents

The plain-English lines on this page are EMStudio's own explanations of Colorado's standards, not the official wording, which Colorado Department of Education publishes in the documents above. Codes and strand names identify each standard.