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# 2-D-1-3

last edited by 6 years, 7 months ago

2.D.1.3 Write and solve one-step word problems involving addition or subtraction using data represented within pictographs and bar graphs with intervals of one.

In a Nutshell

In second grade, students will use data from a pictograph or bar graph and write and solve addition or subtraction word problems. In third grade students will be expected to write and solve one- and two-step problems using categorical data.

## Teacher Actions

• Develop a deep and flexible conceptual understanding by analyzing data in bar-type graphs and tally charts.

• Communicate mathematically about the information gathered and displayed.

• Develop mathematical reasoning when interpreting data from pictographs and bar graphs.

• Develop a productive mathematical disposition by applying the knowledge gained from a collection of data to write and solve one-step word problems.

• Use and connect mathematical representations by creating real-world experiences for data collection that have meaning for students (favorite snack, pet, etc).

• Pose purposeful questions to engage student in a discussion about the meaning of data.

• Facilitate meaningful mathematical discourse of studentsâ€™ ideas.

• Support productive struggle by allowing sufficient wait time so that students can formulate and offer responses, and ask questions.

• Implement tasks that promote reasoning and problem solving by adding to, taking from, putting together, taking apart, comparing, and with unknowns in all positions.

## Misconceptions

• Titles and labels are important in understanding data displays.

• Data from graphs can be used in everyday life

• Addition is used to join sets, subtraction is finding the difference between sets

• Students must know how to write a number sentence.

• Students need experience working with addition and subtraction to solve word problems which include data.

• Student might think addition and subtraction are interchangeable.

• Students may not read the scale correctly. Student may assume all units equal one (Example: One square = 5 people)

• The column/row with the most is the winner.

OKMath Framework Introduction