G1 U10 L2 TE
Take From: Difference Unknown— Word Problems Procedural Lesson Grade 1 · Unit 10 · Lesson 2
Applied MP
MPs * Embedded MP 1
2
3
4
*
*
*
5
6
7
*
8
MC: 1.OA.1 Student Journal Pages
83-88
Problem of the Day
Objective: Today, I will use objects to solve word problems with the difference
unknown.
Vocabulary
Teacher Resources
Take From Difference Unknown – Word Problems: There were 6 kids at recess. 4 kids ran away. How many kids are left?
6-4=X Unknown
X=2
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, and symbols).
Steps: 1. Listen carefully to the numbers in the word problem. 2. Use the numbers to 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 2 P TE
*
Answer Key
Answer Key: I/M 1. 7 - 5 =
SGP
FCU
1. 4 - 3 = Y
1. 7 - 4 =
=2
Y=1
SP 1. 6 - 3 =
=3
=3
CH
HW
1. Check student
1. 8 - 3 = X X=5
drawings; 10—4 = Y; Y = 6
2. 10 - 6 = X
2. 10 - 5 =
X=4
=5
2. 9 -9 = T T=0
2. 6 – 1 = =5
2. Check student drawings;
2.
5–5= =0
6—4 = Y; Y = 2
3. 8 - 6 = X X=2
4. 9 - 3 = Y Y=6
5. 8 - 5 =
3. 4 - 2 = Y Y=2
4. 7 - 2 = =5
5. No, 6-3=W W=3
=3
6. No, 10-6=Z Z=4
6. Check student drawings; 5 –3 = X; X = 2
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Input / Model (Teacher Presents)
*MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Listen to the following word problems. Solve for the unknown.
1. There were 7 boats. 5 boats go home. How many boats are left?
Equation
=
2. Tina had 10 heart stickers. She gave away 6. How many heart stickers are left?
Equation
X =
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Structured Guided Practice (A / B Partners Practice) Directions: Listen to the following word problems. Solve for the unknown.
1. There were 4 owls in a tree. 3 flew away. How many owls are left?
Equation
Y =
2. There were 10 star stickers. 5 got lost. How many star stickers are left?
Equation
=
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Final Check for Understanding (Teacher Checks Work) Directions: Listen to the following word problems. Solve for the unknown.
1. Kaia picked 7 flowers. 4 flowers got lost. How many flowers are left?
Equation
=
2. Cameron had 9 boxes. He gave them all to his brother. How many boxes are left?
Equation
T =
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Student Practice (Students Practice Independently)
Name: ____________________________
Directions: Listen to the following word problems. Solve for the unknown.
Date: ______________________________
1. Lupe had 6 stickers. She lost 3. How many stickers are left?
Equation
=
2. There were 6 books. One book got lost. How many books are left?
Equation
=
3. There were 8 whales. 6 whales swim away. How many whales are left?
Equation
Copyright © Swun Math
X =
Grade 1 Unit 10 Lesson 2 P TE
Student Practice (Students Practice Independently) Directions: Listen to the following word problems. Solve for the unknown.
4. There were 9 donuts. 3 were eaten. How many donuts are left?
Equation
Y =
5. There were 8 frogs in the pond. 5 frogs hop away. How many frogs are left?
Equation
=
6. There were 10 hens. 6 fly away. How many hens are left?
Is Z = 8 correct? If not, solve for the unknown
Yes
Copyright © Swun Math
No
Equation
Z =
Grade 1 Unit 10 Lesson 2 P TE
Challenge Problems Directions: Listen to the word problems. Draw objects to solve them.
1. There were 10 pieces of gum. Kids ate 4 of the pieces of gum. How many pieces of gum are left? Drawings:
Y =
Equation
2. There were 6 soccer balls. Four balls got lost. How many soccer balls are left? Drawings:
=
Equation
Share
*MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Closure 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 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems Directions: Listen to the following word problems. Solve for the unknown.
Name: ____________________________ Date: ______________________________
1. There were 8 star erasers. Three got lost. How many star erasers are left?
Equation
X =
2. There were 5 boats. All the boats went home. How many boats are left?
Equation
Copyright © Swun Math
=
Grade 1 Unit 10 Lesson 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems Directions: Listen to the following word problems. Solve for the unknown.
3. There were 4 ducks. Two got lost. How many ducks are left?
Equation
Y =
4. There were 7 popsicles. 2 got eaten. How many popsicles are left?
Equation
Copyright © Swun Math
=
Grade 1 Unit 10 Lesson 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems
Name: ____________________________
Directions: Listen to the following word problems. Solve for the unknown.
Date: ______________________________
5. There are 6 heart erasers. Three get lost. How many heart erasers are left?
Is W = 9 correct? If not, solve for the unknown
Yes
No
Equation
W =
6. Sam has 5 books. He gives 3 books to his friend. How many books are left? Drawings:
Equation
Copyright © Swun Math
X =
Grade 1 Unit 10 Lesson 2 P TE
Notes
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Applied MP
MPs * Embedded MP 1
2
3
4
*
*
*
5
6
7
*
8
MC: 1.OA.1 Student Journal Pages
83-88
Problem of the Day
Objective: Today, I will use objects to solve word problems with the difference
unknown.
Vocabulary
Teacher Resources
Take From Difference Unknown – Word Problems: There were 6 kids at recess. 4 kids ran away. How many kids are left?
6-4=X Unknown
X=2
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, and symbols).
Steps: 1. Listen carefully to the numbers in the word problem. 2. Use the numbers to 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 2 P TE
*
Answer Key
Answer Key: I/M 1. 7 - 5 =
SGP
FCU
1. 4 - 3 = Y
1. 7 - 4 =
=2
Y=1
SP 1. 6 - 3 =
=3
=3
CH
HW
1. Check student
1. 8 - 3 = X X=5
drawings; 10—4 = Y; Y = 6
2. 10 - 6 = X
2. 10 - 5 =
X=4
=5
2. 9 -9 = T T=0
2. 6 – 1 = =5
2. Check student drawings;
2.
5–5= =0
6—4 = Y; Y = 2
3. 8 - 6 = X X=2
4. 9 - 3 = Y Y=6
5. 8 - 5 =
3. 4 - 2 = Y Y=2
4. 7 - 2 = =5
5. No, 6-3=W W=3
=3
6. No, 10-6=Z Z=4
6. Check student drawings; 5 –3 = X; X = 2
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Input / Model (Teacher Presents)
*MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Listen to the following word problems. Solve for the unknown.
1. There were 7 boats. 5 boats go home. How many boats are left?
Equation
=
2. Tina had 10 heart stickers. She gave away 6. How many heart stickers are left?
Equation
X =
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Structured Guided Practice (A / B Partners Practice) Directions: Listen to the following word problems. Solve for the unknown.
1. There were 4 owls in a tree. 3 flew away. How many owls are left?
Equation
Y =
2. There were 10 star stickers. 5 got lost. How many star stickers are left?
Equation
=
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Final Check for Understanding (Teacher Checks Work) Directions: Listen to the following word problems. Solve for the unknown.
1. Kaia picked 7 flowers. 4 flowers got lost. How many flowers are left?
Equation
=
2. Cameron had 9 boxes. He gave them all to his brother. How many boxes are left?
Equation
T =
MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
Student Practice (Students Practice Independently)
Name: ____________________________
Directions: Listen to the following word problems. Solve for the unknown.
Date: ______________________________
1. Lupe had 6 stickers. She lost 3. How many stickers are left?
Equation
=
2. There were 6 books. One book got lost. How many books are left?
Equation
=
3. There were 8 whales. 6 whales swim away. How many whales are left?
Equation
Copyright © Swun Math
X =
Grade 1 Unit 10 Lesson 2 P TE
Student Practice (Students Practice Independently) Directions: Listen to the following word problems. Solve for the unknown.
4. There were 9 donuts. 3 were eaten. How many donuts are left?
Equation
Y =
5. There were 8 frogs in the pond. 5 frogs hop away. How many frogs are left?
Equation
=
6. There were 10 hens. 6 fly away. How many hens are left?
Is Z = 8 correct? If not, solve for the unknown
Yes
Copyright © Swun Math
No
Equation
Z =
Grade 1 Unit 10 Lesson 2 P TE
Challenge Problems Directions: Listen to the word problems. Draw objects to solve them.
1. There were 10 pieces of gum. Kids ate 4 of the pieces of gum. How many pieces of gum are left? Drawings:
Y =
Equation
2. There were 6 soccer balls. Four balls got lost. How many soccer balls are left? Drawings:
=
Equation
Share
*MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Closure 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 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems Directions: Listen to the following word problems. Solve for the unknown.
Name: ____________________________ Date: ______________________________
1. There were 8 star erasers. Three got lost. How many star erasers are left?
Equation
X =
2. There were 5 boats. All the boats went home. How many boats are left?
Equation
Copyright © Swun Math
=
Grade 1 Unit 10 Lesson 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems Directions: Listen to the following word problems. Solve for the unknown.
3. There were 4 ducks. Two got lost. How many ducks are left?
Equation
Y =
4. There were 7 popsicles. 2 got eaten. How many popsicles are left?
Equation
Copyright © Swun Math
=
Grade 1 Unit 10 Lesson 2 P TE
Homework Unit 10 Lesson 2: Take From: Difference Unknown—Word Problems
Name: ____________________________
Directions: Listen to the following word problems. Solve for the unknown.
Date: ______________________________
5. There are 6 heart erasers. Three get lost. How many heart erasers are left?
Is W = 9 correct? If not, solve for the unknown
Yes
No
Equation
W =
6. Sam has 5 books. He gives 3 books to his friend. How many books are left? Drawings:
Equation
Copyright © Swun Math
X =
Grade 1 Unit 10 Lesson 2 P TE
Notes
Copyright © Swun Math
Grade 1 Unit 10 Lesson 2 P TE
