Today, I will add 2-digit numbers and 1-digit numbers.
Vocabulary
Teacher Resources Considerations:
Application Space:
23 + 6 = T
O
2
3
+ 2
This lesson models how to add 2-digit numbers and 1-digit numbers through the use of a number line and base ten blocks. Stress the importance of showing one’s work to students. Encourage them to take full advantage of the application space provided in order to arrive at their answers.
6
Steps:
9
1. 2. 3. 4.
Copy the problem into your application space. Add the ones. Add the tens. Box your sum.
Application of MPs: MP1:
How can you prove your answers?
MP2: How do you know your answers make sense? MP4: Is there an easier way to find the answer?
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Solve to find the sum. You must prove your work to receive credit.
Directions: Solve to find the sum. You must prove your work to receive credit.
1. Dean has 14 crackers. He buys 7 more crackers. How many crackers does he have in all?
Application Space
crackers 2. Nicole has 23 markers. Her mom buys her 9 more. How many markers does she have altogether?
Application Space
markers
*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: MP1: How did you prove your answers? MP2: How did you know your answers made sense? MP4: Was there an easier way to find the answer?