Identity Properties and Tape Diagrams

Mrs. Bobby introduces identity properties, explaining that what you start with is what you end with. She uses examples involving addition and subtraction to demonstrate this concept. The lesson includes filling in blanks to maintain identity and using tape diagrams for visualization. The session concludes with a recap of the identity properties.

What is the main idea behind identity properties?

• Starting and ending with different values

• Starting and ending with the same value

• Multiplying numbers to get a larger value

• Dividing numbers to get a smaller value

If you add 15 to a number and then subtract 15, what is the result?

• A number greater than the original

• A number less than the original

• Zero

• The original number

In the example with 450, what operation is performed after subtracting 230?

• Adding 450

• Adding 230

• Subtracting 450

• Subtracting another 230

What is the missing number if you start with 1289, subtract a number, and then add it back to get 1289?

• 450

• 230

• 856

• 1289

How many boxes are initially used in the tape diagram example?

• Five

• Four

• Three

• Two

What is the result after adding 5 and then subtracting 5 in the tape diagram?

• Five

• Zero

• The original number

• Ten

What is the purpose of using a tape diagram in the lesson?

• To solve multiplication problems

• To introduce new numbers

• To visualize the identity property

• To complicate the concept

In the final example, what happens after you subtract 2 from 8 and then add 2 back?

• You get 6

• You get 10

• You get 2

• You return to 8

What is the identity property of addition?

• Adding zero to a number changes it

• Dividing a number by itself results in zero

• Adding a number and then subtracting the same number returns to the original

• Multiplying a number by one changes it

What is the final message from Mrs. Bobby at the end of the lesson?

• Do your homework

• Study hard

• Have a great day

• Keep practicing