Teacher Resources Considerations: Through this lesson students will understand the meaning of the equal sign.
Steps: 1. Determine the quantity of each side of the equal sign in each equation. 2. Find the equation that is true (or not true).
Application of MPs: MP2: What steps help you solve your problems? MP4: How do you know your answers are correct? MP8: Can you use any shortcuts to solve the problems?
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Determine which equation is true or false.
1. Circle the equation that is true. 9 + 2 = 3 + 10
8 + 6 = 10 - 7
11 - 1 = 2 + 8
State the objective: Today I will determine if equations involving addition and subtraction are true or false.
Explain that the first step is to solve the expression on either side of the equal sign.
11
13
9 + 2 = 3 + 10
14
3
8 + 6 = 10 - 7
10
10
11 - 1 = 2 + 8
Emphasize the quantity on either side of the equation has to be the same to make the equation true.
Model the quantity on each side of each equation with manipulatives.
11
13
9 + 2 = 3 + 10
14
3
8 + 6 = 10 - 7
10
10
11 - 1 = 2 + 8
Emphasize the only equation that has an equal quantity on both sides is 11- 1= 2+ 8. Circle 11 - 1 = 2 + 8 as the true equation.
/ Directions: Determine which equation is true or false.
2. Circle the equation that is false. 9–5 =3+1
4 + 4 = 11- 4
7 + 2 = 12 - 3
Restate the objective: Today I will determine if equations, involving addition and subtraction are true or false.
Explain that the first step is to solve the expression on either side of the equal sign.
4
4
9–5 =3+1
8
7
4 + 4 = 11- 4
9
9
7 + 2 = 12 - 3
Emphasize the quantity on either side of the equation has to be the same to make the equation true.
Emphasize the question being asked is which equation is false. This means the equation that does not have the same quantity on either side must be identified.
Model with manipulatives the quantity on each side of each equation.
4
=
4
9–5 =3+1
8
=
7
4 + 4 = 11- 4
9
9
7 + 2 = 12 - 3
Emphasize the only equation that has a different quantity on both sides is 4 + 4 = 11 - 4. Circle 4 + 4 = 11 – 7 as the false equation.
Directions: Determine which equation is true or false.
1. Circle the equation that is true. 14 - 6 = 11 - 4
12- 5 = 5 + 2
1 + 5 = 16 - 8
2. Circle the equation that is false. 10 + 6 = 8 + 8
14- 5 = 5 + 4
10 + 2 = 14 - 7
*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 steps helped you solve your problems? MP4: How did you know your answers were correct? MP8: Did you use any shortcuts to solve the problems?