Math Addition and Subtraction Finding the Missing Factor

+ Math: Addition and Subtraction Finding the Missing Factor in ADDITION & SUBTRACTION PROMLEMS

+ Today’s Math Goal n Students will be demonstrating their ability to write Math problems. n Students will be demonstrating their ability to find a missing factor in an addition problem. n Students will be demonstrating their ability to find a missing factor in a subtraction problem. n Key Words: Factor, Equation, Problem, Difference & Sum n You will need: pencil, eraser, math notebook.

+ Today’s Math Lesson – A Little Review n What is the METHOD for finding the MISSING FACTOR in an ADDITION EQUATION? [2 minutes] n What is the METHOD for finding the MISSING FACTOR in a SUBTRACTION EQUATION? [2 minutes] n What is the difference between an EQATION and a PROBLEM? [2 minutes]

+ Today’s Math Lesson n June had $450. Her mom told her not to spend more than $100. She went shopping and bought some things. She came home with $328 dollars left. n A) How much did June spend? n B) Did June spend more than she was allowed to? n NOTE: How much time do you need to solve this problem?

+ Today’s Math Lesson n Paul had $327 dollars. He went to work and got paid. He came home with $8 764 dollars. n A) How much money did Paul make at work? n Extra Time? Write your own ADDITION MISSING FACTOR PROBLEM?

+ Practice Time! n Jason collects stamps. He went to the stamp convention with 5 7324 stamps in his collection. He came home with 9 111 stamps in his collection. n A) How many stamps did Jason buy at the stamp convention?

+ Practice Time! n Patrick sells hats at his HABIDASHERY (that might be a new word for some of you!). He started his day with 10 000 hats in his store. He ended his day with 8 723 hats in his store. n How many hats did Patrick sell in one day?

+ Practice Time! n Aquaman saves many lives. On Monday he saved a boat from crashing and saved 4 561 lives. On Tuesday he stopped a flood and saved X number of lives. When he woke up on Wednesday morning he had saved a total of 10 000 lives. n A) How many lives did Aquaman save on Tuesday?

+ Practice Time! n The Beatles sell many concert tickets. Their show has a total 9 874 tickets to sell. After the first day of sale there are 89 tickets left to sell. n A) How many tickets did their concert sell in its first day?

+ Practice Time! n Now write and solve your own MISSING FACTOR ADDITION PROBLEM! n Now write and solve your own MISSING FACTOR SUBTRACTION PROBLEM!

+ That’s it for today! n Thanks for all of your hard work!