Grade 2 - Algebraic Reasoning Unit

2.7A

Determine whether a number up to 40 is even or odd using pairings of objects to represent the number.
2.7C

Represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem.

The Algebraic Reasoning Unit involves understanding number patterns within properties of numbers and operations in order to answer questions such as:

How can you prove this number is odd or even?
How can you use the relationship between addition and subtraction to solve problems in which the unknown may be any one of the terms in the equation?
Give an equation in which the unknown may be any one of its terms, how can you create a situation to match it? How can you prove that your situation matches the equation?

Select Units and Find Tasks By Standard

N/A: Denotes standards that are not applicable to problem solving.

The N/A classification refers to TEKS Standards that cannot be assessed through problem solving.

For this reason, tasks have not been included for these particular standards.

Students find the total number of legs on 8 cows and 10 chickens.

Students determine if there is the same total number of cars and trucks on the shelves.

Students determine how many pink shells Kim found on the beach.

Students determine how many nuts Sam the squirrel hides under a rock.

Using decades and scores, students find two different ways to total a century.

Students determine if 3 children used the same amount of beads to make their bracelets.

Students determine the number of pennies in a jar to start with after more pennies are added to the jar.

Given twenty goldfish and four fish tanks, students determine if there is an odd or even number of fish in each tank.

Students determine how much Mom paid for a peach, if she had 35 cents left over in her purse.

Students count the number of legs on three spiders and six ladybugs.

Students determine how many flowers are left to sell after some flowers have been sold.