Today I will use objects to solve comparing word problems where the difference is unknown.
Vocabulary
Notes
Compare Difference Unknown: How many more – Word Problems: There are 6 brown horses. There are 5 white horses. How many more brown horses are there than white horses? 6-5=W
Unknown
Solve for the unknown: 6 - 5= 1 W=1 This problem can also be solved as a missing addend problem.
5+W=6 W=1
Compare Difference Unknown: How many fewer – Word Problems: June has 8 toys. Colleen has 12 toys. How many fewer toys does June have than Colleen? 12 - 8 = W
Unknown
Solve for the unknown: 12 - 8= 4 W=4 This problem can also be solved as a missing addend problem.
Directions: Solve for the unknown in the following problems.
1. There are 11 purple balloons and 4 orange balloons. How many fewer orange balloons are there than purple balloons?
2. There are 6 bananas and 9 watermelons. How many more watermelons are there than bananas?
*MP3: Do you agree/disagree with what said? *MP6: How do you know your answers are correct/reasonable?
Recap today’s lesson with one or more of the following MP questions: MP2: What math symbol did you use today? MP6: How did you know your answers were correct? MP7: What steps helped you solve the problems?