Search the California Content Standards

Cluster:
Use place value understanding and properties of operations to add and subtract.

Standard:
Explain why addition and subtraction strategies work, using place value and the properties of operations.

Footnote:
Explanations may be supported by drawings or objects.

Cluster:
Represent and solve problems involving addition and subtraction.

Standard:
Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Footnote:
See Glossary, Table 1.

Cluster:
Add and subtract within 20.

Standard:
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

Footnote:
See standard 1.OA.6 for a list of mental strategies.

Cluster:
Work with equal groups of objects to gain foundations for multiplication.

Standard:
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

Cluster:
Work with equal groups of objects to gain foundations for multiplication.

Standard:
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.

Cluster:
Reason with shapes and their attributes.

Standard:
Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

Cluster:
Reason with shapes and their attributes.

Standard:
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.

Cluster:
Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.

Standard:
Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

Cluster:
Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.

Standard:
Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.

Footnote:
Excludes compound units such as cm^3 and finding the geometric volume of a container. Excludes multiplicative comparison problems (problems involving notions of “times as much”; see Glossary, Table 2).

Cluster:
Represent and interpret data.

Standard:
Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step “how many more” and “how many less” problems using information presented in scaled bar graphs. For example, draw a bar graph in which each square in the bar graph might represent 5 pets.