Today, I will subtract multiples of 10 from multiples of 10.
Vocabulary
Teacher Resources
Application Space:
Considerations:
30 — 20 =
—
Teacher must model the order in which students should subtract (ones first, then tens) and emphasize how to copy the problem into the application space and box the answer.
T
O
3
0
2
0
1
0
Steps: 1. Copy the problem into your application space. 2. Subtract the ones. 3. Subtract the tens. 4. Box your answer.
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 difference. You must prove your work to receive credit.
Directions: Solve to find the difference. You must prove your work to receive credit.
1. Jason has 30 marbles. He lends 10 of the marbles to his cousin. How many marbles does Jason have left? Application Space
marbles
2. Tina ran for 70 minutes. Julia ran for 40 minutes. How many more minutes did Tina run than Julia? Application Space
minutes
*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?