G1 U10 L8 SJ
Applied MP
MPs * Embedded MP
Procedural Lesson Grade 1 · Unit 10 · Lesson 8
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MC: 1.OA.1
Today, I will solve word problems with the start unknown.
Vocabulary
Steps
Take From Start Unknown – Word Problems:
1. Listen carefully to the numbers in the word problem.
There were some horses in a field. Six horses ran away, and now there are 3 horses. How many horses were in the field to begin with?
2. Use the numbers to write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
W-6=3 Unknown Solve for the unknown:
6+3=9 W= 9
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
/ Directions: Write the equation and solve for the unknown.
1. Chris has some dimes. He lends 6 dimes to his sister. Now he has 3 dimes left. How many dimes did he start with?
Z= 2. Helen has a bunch of flowers. She gives 4 flowers away. Now she has 8 flowers. How many flowers did Helen begin with?
= 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 8 P SJ
Directions: Write the equation and solve for the unknown.
1. Frankie takes jump ropes to recess. He gives 10 jump ropes away. Now he has 3 jump ropes left. How many jump ropes did Frankie begin with?
= 2. There are pigs in the barn. Seven pigs go outside and only 3 pigs are left. How many pigs started in the barn?
W=
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
Name: ____________________________ Directions: Write the equation and solve for the unknown.
Date: ______________________________
1. Carmen sees a swarm of butterflies. Eight butterflies fly away. There are 6 butterflies left. How many butterflies did Carmen see to begin with?
V= 2. Sonia’s mom made hair bows. She gave 8 bows to Sonia. She only has 8 bows left. How many bows did she make?
= 3. Ella had erasers in her pencil box. Nine erasers got lost, and now she only has 5 left. How many erasers did she start with in her pencil box?
B= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
Directions: Write the equation and solve for the unknown.
4. Sidney has a plate of cookies. She gives 2 cookies away and has 9 cookies left. How many cookies did she begin with?
X= 5. Ava has a pack of markers. She loses 5 markers. Now she has 8 markers. How many markers did Ava begin with?
= 6. Record the equation used to solve the following word problem. Can X= 0? If not, solve for the unknown. Students took handballs to recess. Four handballs went over the wall. Now, 4 handballs are left. How many handballs did they take to recess to begin with?
X=0
Yes
Copyright © Swun Math
No
X= Grade 1 Unit 10 Lesson 8 P SJ
Directions: Write the equation and solve for the unknown.
1. Jocelyn has a bag full of beads. She gives 5 beads to her cousin. She has 20 beads left. How many beads did Jocelyn begin with?
= 2. Troy has blocks in a bag. He gives 10 blocks to his friend and now he has 10 left. How many blocks did he have in his bag to begin with?
Z= *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 8 P SJ
MPs * Embedded MP
Procedural Lesson Grade 1 · Unit 10 · Lesson 8
1
2
3
4
*
*
*
5
6
7
8
*
*
MC: 1.OA.1
Today, I will solve word problems with the start unknown.
Vocabulary
Steps
Take From Start Unknown – Word Problems:
1. Listen carefully to the numbers in the word problem.
There were some horses in a field. Six horses ran away, and now there are 3 horses. How many horses were in the field to begin with?
2. Use the numbers to write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
W-6=3 Unknown Solve for the unknown:
6+3=9 W= 9
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
/ Directions: Write the equation and solve for the unknown.
1. Chris has some dimes. He lends 6 dimes to his sister. Now he has 3 dimes left. How many dimes did he start with?
Z= 2. Helen has a bunch of flowers. She gives 4 flowers away. Now she has 8 flowers. How many flowers did Helen begin with?
= 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 8 P SJ
Directions: Write the equation and solve for the unknown.
1. Frankie takes jump ropes to recess. He gives 10 jump ropes away. Now he has 3 jump ropes left. How many jump ropes did Frankie begin with?
= 2. There are pigs in the barn. Seven pigs go outside and only 3 pigs are left. How many pigs started in the barn?
W=
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
Name: ____________________________ Directions: Write the equation and solve for the unknown.
Date: ______________________________
1. Carmen sees a swarm of butterflies. Eight butterflies fly away. There are 6 butterflies left. How many butterflies did Carmen see to begin with?
V= 2. Sonia’s mom made hair bows. She gave 8 bows to Sonia. She only has 8 bows left. How many bows did she make?
= 3. Ella had erasers in her pencil box. Nine erasers got lost, and now she only has 5 left. How many erasers did she start with in her pencil box?
B= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P SJ
Directions: Write the equation and solve for the unknown.
4. Sidney has a plate of cookies. She gives 2 cookies away and has 9 cookies left. How many cookies did she begin with?
X= 5. Ava has a pack of markers. She loses 5 markers. Now she has 8 markers. How many markers did Ava begin with?
= 6. Record the equation used to solve the following word problem. Can X= 0? If not, solve for the unknown. Students took handballs to recess. Four handballs went over the wall. Now, 4 handballs are left. How many handballs did they take to recess to begin with?
X=0
Yes
Copyright © Swun Math
No
X= Grade 1 Unit 10 Lesson 8 P SJ
Directions: Write the equation and solve for the unknown.
1. Jocelyn has a bag full of beads. She gives 5 beads to her cousin. She has 20 beads left. How many beads did Jocelyn begin with?
= 2. Troy has blocks in a bag. He gives 10 blocks to his friend and now he has 10 left. How many blocks did he have in his bag to begin with?
Z= *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 8 P SJ
