ALEX Classroom Resources

   View Standards     Standard(s): [MA2019] (3) 8 :

8. Determine and justify solutions for two-step word problems using the four operations and write an equation with a letter standing for the unknown quantity. Determine reasonableness of answers using number sense, context, mental computation, and estimation strategies including rounding.

In this interactive activity, students will be led through steps to estimate the sums and differences of whole numbers using rounding and front-end estimation. There are teaching activities as well as practice activities available. After utilizing this resource, the students can complete the short quiz to assess their understanding. 

   View Standards     Standard(s): [MA2019] (3) 8 :

8. Determine and justify solutions for two-step word problems using the four operations and write an equation with a letter standing for the unknown quantity. Determine reasonableness of answers using number sense, context, mental computation, and estimation strategies including rounding.

[MA2019] (4) 3 :

3. Determine and justify solutions for multi-step word problems, including problems where remainders must be interpreted.

a. Write equations to show solutions for multi-step word problems with a letter standing for the unknown quantity.

b. Determine reasonableness of answers for multi-step word problems, using mental computation and estimation strategies including rounding.

[MA2019] (4) 9 :

9. Round multi-digit whole numbers to any place using place value understanding.

In this interactive activity, students will be led through steps to estimate numbers by rounding in order to make problems easier to solve. There are teaching activities as well as practice activities available. A handout that reviews the strategies taught during the activity can be printed. After utilizing this resource, the students can complete the short quiz to assess their understanding.

   View Standards     Standard(s): [MA2019] (3) 8 :

8. Determine and justify solutions for two-step word problems using the four operations and write an equation with a letter standing for the unknown quantity. Determine reasonableness of answers using number sense, context, mental computation, and estimation strategies including rounding.

In this interactive activity, students will be led through steps to create and solve equations by identifying the appropriate mathematical operation. There are teaching activities as well as practice activities available. A handout that reviews the steps taught during the activity can be printed. After utilizing this resource, the students can complete the short quiz to assess their understanding.

   View Standards     Standard(s): [MA2019] (3) 8 :

8. Determine and justify solutions for two-step word problems using the four operations and write an equation with a letter standing for the unknown quantity. Determine reasonableness of answers using number sense, context, mental computation, and estimation strategies including rounding.

In third grade, students will solve two-step word problems using addition, subtraction, multiplication, and division. For example: There were ten adults and five children at the movies. Each adult ticket costs $8.00 and each child ticket costs $3.00. What is the total cost of all the tickets? The video demonstrates how to solve this problem.