Eureka Math Grade 1 Module 1 Lesson 21 Answer Key

Engage NY Eureka Math 1st Grade Module 1 Lesson 21 Answer Key

Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key

Add the numbers on the pairs of cards. Write the number sentences. Color doubles red. Color doubles plus 1 blue.

Question 1.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 1

Answer: 6
The above equation shows a pair of cards
ADD the pair of cards 
By adding 3 and 3
we get 6
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-1

Question 2.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 2

Answer:8
The above equation shows a pair of cards
ADD the pair of cards 
By adding 4 wth 4
we get 8
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-2

Question 3.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 3

Answer:7
The above equation shows a pair of cards
ADD the pair of cards 
By adding 3 wth 4
we get 7
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-3

Question 4.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 4

Answer:9
The above equation shows a pair of cards
ADD the pair of cards 
By adding 5 wth 4
we get 9
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-4

Solve. Use your doubles to help. Draw and write the double that helped.

Question 5.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 5

Answer: 9
Given the numbers are 5 and 4
To find the missing number
Add 5 with 4
we get 9
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-5

Question 6.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 6

Answer:7
Given the numbers are 3 and 4
To find the missing number
Add 3 with 4
we get 7
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-6

Question 7.
Solve the doubles and the doubles plus 1 number sentences.
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 7
Answer:
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-7

Question 8.
Show how this strategy can help you solve 5 + 6 =
Eureka Math Grade 1 Module 1 Lesson 21 Problem Set Answer Key 8
Answer:11
Given the numbers are 5 and 6
To find the missing number
Add 5 with 6
we get 11
Eureka-Math-Grade-1-Module-1-Lesson-21-Problem-Set-Answer-Key-8

Question 9.
Write a set of 4 related addition facts for the number sentences of Problem 7(d).
Answer: 4+4 =8
8+4+4
4+5=9
9=4+5

Eureka Math Grade 1 Module 1 Lesson 21 Exit Ticket Answer Key

Write the double and double plus 1 number sentence for each 5-group card.
Engage NY Math 1st Grade Module 1 Lesson 21 Exit Ticket Answer Key 9
Answer:
Engage-NY-Math-1st-Grade-Module-1-Lesson-21-Exit-Ticket-Answer-Key-9

Eureka Math Grade 1 Module 1 Lesson 21 Homework Answer Key

Question 1.
Draw the 5-group card to show a double. Write the number sentence to match the cards.
a. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 9.1
Answer:The double  fact that hlped to solve the euqation is
4+4=8
For which the double+1 fact is 4+5=9
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-9.1

b. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 9.2
Answer:The double  fact that hlped to solve the euqation is
3+3=6
For which the double+1 fact is 3+4=7
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-9.2

c. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 9.3
Answer:The double  fact that hlped to solve the euqation is
5+5=10
For which the double+1 fact is 5+6=11
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-9.3

 

Question 2.
Fill in the 5-group cards in order from least to greatest, double the number, and write the number sentences.
a. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 10

b. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 11

c. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 12

d. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 13

e. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 14
Answer:
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-img 4

Question 3.
Solve the number sentences.
a. 3 + 3 = __

Answer:6
Given : two numbers are 3 and 3
By adding 3 with 3 we get 6
3 + 3 = 6

b. 5 + __ = 10

Answer:10
Given : two numbers are 5 and 10
by subracting 5 from 10 we get 5
10-5=5
so the issing number is 5
5 + 5 = 10

c. 1 + __ = 2

Answer: 1
Given : two numbers are 1 and 2
by subracting 1 from 2 we get 1
2-1=1
so the issing number is 1
1+1=2

d. 4 = __ + 2

Answer:2
Given : two numbers are 4 and 2
by subracting 2 from 4 we get 2
4-2=2
so the issing number is 2
4 = 2 + 2

e. 8 = 4 + __

Answer:4
Given : two numbers are 4 and 8
by subracting 4 from 8 we get4
8-4=4
so the issing number is 5
8 = 4 + 4

Question 4.
Match the top cards to the bottom cards to show doubles plus 1.
a. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 15

b. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 16

c. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 17

d. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 18

Answer:
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-img 3

Question 5.
Solve the number sentences. Write the double fact that helped you solve the double plus 1.
a. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 19
Answer: The double +1 fact that hlped to solve the euqation is
2+3=5
For which the double fact is 2+2=4
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-19

b. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 20
Answer:The double +1 fact that hlped to solve the euqation is
3+4=7
For which the double fact is 3+3=6
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-20

c. Eureka Math 1st Grade Module 1 Lesson 21 Homework Answer Key 21
Answer:The double +1 fact that hlped to solve the euqation is
4+5=9
For which the double fact is 4+4=8
Eureka-Math-1st-Grade-Module-1-Lesson-21-Homework-Answer-Key-21

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