G1 U10 L3 TE
Applied MP
MPs * Embedded MP
Conceptual Lesson Grade 1 · Unit 10 · Lesson 3 MC: 1.OA.1
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Student Journal Pages
89-92
unknown.
Today, I will use objects to solve problems with the change
Vocabulary
Teacher Resources
Take From Change Unknown – Word Problems: There were 7 kids at the park. Some kids ran home. There is 1 kid left. How many kids ran home?
7-X=1 Unknown Solve for the unknown:
7-1=6 X=6
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, symbols). Problems in this lesson prepare students to work with equations and word problems. Both skills are needed in the following lessons.
Steps: 1. Pay attention to the numbers in the word problems or equations. 2. Read or write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
Application of MPs: MP2: What math symbol can you use today? MP6: How do you know your answers are correct? MP7: What steps help you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Answer Key: I/M
SGP
1. x=6
2. = 8
1.
=5
2. W = 2
FCU
HW
1.
1. Check drawings. 7 + 4 = 11 erasers
11 — = 5 11 — 5 = 6 =6
2. 9 – Y = 1 9–1=8 Y= 8
2. Check drawings. 6 + 7 = 13 shapes
3. Check drawings. 5 + 9 = 14 cupcakes
4. Check drawings. 3 + 9 = 12 fish
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Solve for the unknown in the following problems.
1. Equation
State the objective: Today I will use objects to solve problems with the change unknown.
7–X=1 X=
Explain that, since the largest number is the first number of a subtraction equation, and the second number, or the change, is unknown in this equation, the unknown will be a smaller number. To get a smaller number, the two numbers given in the equation can be subtracted.
Model how to write the equation 7-1= and use 7 objects, taking one away, to find the difference of 6.
7–1=6
Explain that the unknown number is 6 and write X= 6 under the subtraction equation.
7–X=1 7–1=6 X= 6
Model using objects to prove that 7 – 6 = 1.
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ Directions: Solve for the unknown in the following problems.
2. Word Problem
Restate the objective: Today I will use objects to solve problems with the change unknown.
Read the following word problem: Simon had 12 books. He left some books at school, so now he has 4 books. How many books did he leave at school?
Model how to use the information from the word problem to write a change unknown equation.
12 – = 4 =
Explain that, since the largest number is the first number of a subtraction equation and the second number, or the change, is unknown in this equation, the unknown will be a smaller number. To get a smaller number the two numbers given in the equation can be subtracted.
Model how to write the equation 12 - 4= and use 12 objects, taking 4 away, to find the difference of 8.
12 – 4 = 8
Explain that the unknown number is 8 and write equation.
= 8 under the subtraction
12 – = 4 12 – 4 = 8 = 8
Model using objects to prove that 12 – 8 = 4.
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ Directions: Solve for the unknown in the following problems.
1.
Restate the objective.
Direct students to solve for the unknown using equations and objects.
7– =2 7—2=5 =
2.
Restate the objective.
Read the following word problem: There were 8 gumballs in a bowl. Some were eaten and now there are 6 left. How many gumballs were eaten?
Direct students to write an equation representing the unknown and then use objects to solve for the unknown.
8–W=6 8–6=2 W= 2
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Directions: Solve for the unknown in the following problems.
1. Equation:
11 — = 5 11 — = 5 11 — 5 = 6 =6
2. Word Problem: There were 9 cats in the grass. Some cats climbed up a tree. Now there is 1 cat in the grass. How many cats are in the tree?
9–Y=1 9–1=8 Y= 8
*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?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Name: ____________________________ Date: ______________________________
Directions: Use drawings to solve the following word problems. Record the equation.
1. There are 7 sun erasers and 4 moon erasers. How many erasers are there in all?
2. There are 6 hearts and 7 triangles. How many shapes are there altogether?
Drawing:
Drawing:
+
=
+
=
Equation:
Equation:
3. Nancy made 5 cupcakes. Carlos made 9 cupcakes. How many cupcakes did they make altogether?
4. There were 3 yellow fish and 9 orange fish in the pond. How many fish were there in total?
Drawing:
Drawing:
+ Equation:
Copyright © Swun Math
=
+
=
Equation:
Grade 1 Unit 10 Lesson 3 C TE
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
MPs * Embedded MP
Conceptual Lesson Grade 1 · Unit 10 · Lesson 3 MC: 1.OA.1
1
2
*
3
4
5
6
7
8
*
Student Journal Pages
89-92
unknown.
Today, I will use objects to solve problems with the change
Vocabulary
Teacher Resources
Take From Change Unknown – Word Problems: There were 7 kids at the park. Some kids ran home. There is 1 kid left. How many kids ran home?
7-X=1 Unknown Solve for the unknown:
7-1=6 X=6
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, symbols). Problems in this lesson prepare students to work with equations and word problems. Both skills are needed in the following lessons.
Steps: 1. Pay attention to the numbers in the word problems or equations. 2. Read or write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
Application of MPs: MP2: What math symbol can you use today? MP6: How do you know your answers are correct? MP7: What steps help you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Answer Key: I/M
SGP
1. x=6
2. = 8
1.
=5
2. W = 2
FCU
HW
1.
1. Check drawings. 7 + 4 = 11 erasers
11 — = 5 11 — 5 = 6 =6
2. 9 – Y = 1 9–1=8 Y= 8
2. Check drawings. 6 + 7 = 13 shapes
3. Check drawings. 5 + 9 = 14 cupcakes
4. Check drawings. 3 + 9 = 12 fish
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Solve for the unknown in the following problems.
1. Equation
State the objective: Today I will use objects to solve problems with the change unknown.
7–X=1 X=
Explain that, since the largest number is the first number of a subtraction equation, and the second number, or the change, is unknown in this equation, the unknown will be a smaller number. To get a smaller number, the two numbers given in the equation can be subtracted.
Model how to write the equation 7-1= and use 7 objects, taking one away, to find the difference of 6.
7–1=6
Explain that the unknown number is 6 and write X= 6 under the subtraction equation.
7–X=1 7–1=6 X= 6
Model using objects to prove that 7 – 6 = 1.
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ Directions: Solve for the unknown in the following problems.
2. Word Problem
Restate the objective: Today I will use objects to solve problems with the change unknown.
Read the following word problem: Simon had 12 books. He left some books at school, so now he has 4 books. How many books did he leave at school?
Model how to use the information from the word problem to write a change unknown equation.
12 – = 4 =
Explain that, since the largest number is the first number of a subtraction equation and the second number, or the change, is unknown in this equation, the unknown will be a smaller number. To get a smaller number the two numbers given in the equation can be subtracted.
Model how to write the equation 12 - 4= and use 12 objects, taking 4 away, to find the difference of 8.
12 – 4 = 8
Explain that the unknown number is 8 and write equation.
= 8 under the subtraction
12 – = 4 12 – 4 = 8 = 8
Model using objects to prove that 12 – 8 = 4.
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
/ Directions: Solve for the unknown in the following problems.
1.
Restate the objective.
Direct students to solve for the unknown using equations and objects.
7– =2 7—2=5 =
2.
Restate the objective.
Read the following word problem: There were 8 gumballs in a bowl. Some were eaten and now there are 6 left. How many gumballs were eaten?
Direct students to write an equation representing the unknown and then use objects to solve for the unknown.
8–W=6 8–6=2 W= 2
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Directions: Solve for the unknown in the following problems.
1. Equation:
11 — = 5 11 — = 5 11 — 5 = 6 =6
2. Word Problem: There were 9 cats in the grass. Some cats climbed up a tree. Now there is 1 cat in the grass. How many cats are in the tree?
9–Y=1 9–1=8 Y= 8
*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?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
Name: ____________________________ Date: ______________________________
Directions: Use drawings to solve the following word problems. Record the equation.
1. There are 7 sun erasers and 4 moon erasers. How many erasers are there in all?
2. There are 6 hearts and 7 triangles. How many shapes are there altogether?
Drawing:
Drawing:
+
=
+
=
Equation:
Equation:
3. Nancy made 5 cupcakes. Carlos made 9 cupcakes. How many cupcakes did they make altogether?
4. There were 3 yellow fish and 9 orange fish in the pond. How many fish were there in total?
Drawing:
Drawing:
+ Equation:
Copyright © Swun Math
=
+
=
Equation:
Grade 1 Unit 10 Lesson 3 C TE
Copyright © Swun Math
Grade 1 Unit 10 Lesson 3 C TE
