Math Story Adventures: Add & Subtract!
Math Story Adventures: Add & Subtract!
Items in this lesson
Math Story Adventures: Add & Subtract!
What do you already know about solving word problems with addition and subtraction?
Learning Objective
At the end of the lesson you will solve word problems within 20 by adding or subtracting, using objects, drawings, and equations with a symbol for the unknown number.
What Are Word Problems?
Word problems are stories that use math. They ask us to find answers about things in the real world.
How many beams did they have prior to the delivery?
19
5
8
10
How many beams did they have after the delivery?
8
7
10
19
How many beams were delivered?
11
10
8
19
Addition in Word Problems
When you add in a word problem, you find out how many you have in all. Look for clues like: 'put together' or 'add more.'
Subtraction in Word Problems
When you subtract, you find out what is left. Clues: 'take away,' 'left,' or 'fewer.'
Try It Together!
Jane has 8 red balls and 5 blue balls. How many balls does she have in all? Draw or use objects to show your answer.
Ms. Maxwell wanted to treat her class with donuts, because they all passed their math test. Ms. Maxwell buys 1 box, which has 12 donuts. She buys another box that has 12 donuts. Does she have enough for 22 students?
Yes, she will have 22
No, she will have 12
Yes, she will have 24
No, she will have 0
What Did You Learn Today?
You practiced solving word problems by adding and subtracting, using drawings, objects, and equations. Great job!
Different Kinds of Word Problems
Sometimes you need to find what you started with or what is left. Sometimes you need to find what was added or taken.
You might need to add different groups or compare two groups to see which is bigger or smaller.
Adding and Taking Away
Putting Together and Comparing
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
