Section A: Practice Problems Add To and Take From Story Problems

Section Summary

Details

We solved story problems and represented them with objects, drawings, words, and equations.

  • We solved story problems with addition.

    Mai has read 3 books about dogs. Diego gives her 4 more books to read. How many books about dogs will Mai read all together?

    Drawing to show the story problem. Equation, 3 plus 4 equals boxed 7.

  • We solved story problems with subtraction.

    Tyler has 7 books about spiders. He gives 3 to Kiran to read. How many books does Tyler have left?

    Drawing to show a story problem. Equation, 7 minus 3 equals boxed 4.

  • We solved story problems where the change was unknown.

    Lin has 5 books. Her teacher gives her some more books. Now she has 10 books to read. How many books did her teacher give her?

    10 squares. 5 labeled Lin’s books. 5 labeled books. Equation, 5 plus 5 equals 10.

  • We learned that the equal sign means “the same amount as” and “equals.”

Problem 1 (Pre-Unit)

There are 2 plants in the classroom.
The teacher brings 3 more plants.
How many plants are in the classroom now?
Show your thinking using drawings, numbers, or words.

Problem 2 (Pre-Unit)

There are 8 cars parked on the street.
Some cars are red and some are blue.
Show how many red and blue cars could be on the street.
Show your thinking using drawings, numbers, or words.

Problem 3 (Pre-Unit)

Write a number in the blank to make each equation true.

Problem 4 (Lesson 2)

There are 7 books on the shelf.
Mai takes 2 of the books off the shelf.
How many books are on the shelf now? Does this story match the equation or ?
Show your thinking using drawings, numbers, or words.

Equation:

Problem 5 (Lesson 3)

There were 7 kids playing in the swimming pool.
Then some more kids came to play with them.
Now there are 10 kids playing in the swimming pool.
How many kids came to play?
Show your thinking using drawings, numbers, or words.

Problem 6 (Lesson 4)

There were 3 students on the playground.
Some more students came to the playground.
Now there are 9 students on the playground. How many students came to the playground?
Show your thinking using drawings, numbers, or words.

Equation:

Problem 7 (Exploration)

  1. Write an addition or subtraction story problem about something you did this week.

  2. Trade your problem with a friend and solve your friend’s problem.

Problem 8 (Exploration)

Choose one of the equations.

Write a story problem that the equation matches.

Trade with a partner and decide which equation matches your partner’s story.