Addition and Subtraction Number Stories Using Comparison Models

Let’s Review What We Know About Addition and Subtraction Number Stories

Addition Key Words Total In all Sum Altogether Have now Found Got WORDS

Subtraction Key Words How much more Gave away Difference Less than Have now Lost Have left WORDS

Let’s Review What We Know About Comparison Models

Start Change End Can be used for addition or subtraction Needs a + sign or a – sign in the middle circle

Part Part Total Used for addition Largest number goes in the biggest box (the answer) Put each of the numbers from the number story in to the part boxes Total Part

Quantity Quantity Difference Used for subtraction The big number from the number story goes in to the large Quantity box The small number from the number story goes in to the small Quantity box Quantity 30 Quantity Difference 1812

Let’s Try Some Together

Start Change End Bill had 20 pencils. He gave 15 pencils to Sam. How many pencils does he have now?

Part Part Total Jim made 10 cookies. He made 8 more cookies. How many cookies does he have altogether? Total 18 Part 108

Quantity Quantity Difference Jan had 30 marbles. She lost 12 marbles. How many marbles does she have left? Quantity 30 Quantity Difference 1812

Your Task You must create and solve 3 number stories. There should be one number story for each comparison model. Remember to use capital letters. Remember to use punctuation marks.

How To Do It 1.Find the Noyes folder on the desktop 2.Double click on the Noyes folder 3.Double click on Comparison Models 4.A PowerPoint slide will open. 5.The first slide is your title slide. 6.Click on Mrs. Noyes. Erase my name and put yours 7.The next slide is your master slide. 8.In the toolbar at the top click on insert. 9.Click on duplicate slide 10.Click on Comparison Model. Erase it and type which model you are using. –Start Change End –Part Part Total –Quantity Quantity Difference 11.Create a number story on that slide. –Click on Type Your First Sentence Here. Erase it and type your first sentence. –Click on Type Your Second Sentence Here. Erase it and type your second sentence. –Click on Type Your Question Here. Erase it and type your question. 12.Choose the correct comparison model 13.Click on the 0 and then change it to the numbers from your number story. 14.It is time to add a new slide. 15.Go back to the Master Slide. 16.In the toolbar at the top click on insert. 17.Click on duplicate slide 18.Now do steps again to create your second number story (remember to use a different comparison model) 19.Create another duplicate slide 20.Now do steps again to create your second number story (remember to use a different comparison model) 21.Save your work to the Noyes folder. 22.Tell a teacher you are done.