## Engage NY Eureka Math 2nd Grade Module 8 Lesson 3 Answer Key

### Eureka Math Grade 2 Module 8 Lesson 3 Core Fluency Practice Set A Answer Key

Question 1.
10 + 9 =

Explanation:
Addition fluency is a method to remember the addition facts. So we can produce the answers quickly and accurately.
By adding 10 with 9 we get 19

Question 2.
10 + 1 =

By adding 10 with 1 we get 11

Question 3.
11 + 2 =

By adding 10 with 3 we get 13

Question 4.
13 + 6 =

By adding 13 with 6 we get 19

Question 5.
15 + 5 =

By adding 15 with 5 we get 20

Question 6.
14 + 3 =

By adding 14 with 3 we get 17

Question 7.
13 + 5 =

By adding 13 with 5 we get 18

Question 8.
12 + 4 =

By adding 12 with 4 we get 16

Question 9.
16 + 2 =

By adding 16 with 2 we get 18

Question 10.
18 + 1 =

By adding 18 with 1 we get 19

Question 11.
11 + 7 =

By adding 11 with 7 we get 18

Question 12.
13 + 4 =

By adding 13 with 4 we get 17

Question 13.
14 + 5 =

By adding 14 with 5 we get 19

Question 14.
9 + 4 =

By adding 9 with 4 we get 13

Question 15.
9 + 2 =

By adding 9 with 2 we get 11

Question 16.
9 + 9 =

By adding 9 with 9 we get 18

Question 17.
6 + 9 =

By adding 6 with 9 we get 15

Question 18.
8 + 9 =

By adding 8 with 9 we get 17

Question 19.
7 + 8 =

By adding 7 with 8 we get 15

Question 20.
8 + 8 =

By adding 8 with 8 we get 16

Question 21.
3 + 9 =

By adding 3 with 9 we get 12

Question 22.
4 + 8 =

By adding 4 with 8 we get 12

Question 23.
5 + 9 =

By adding 5 with 9 we get 14

Question 24.
8 + 8 =

By adding 8 with 8 we get 16

Question 25.
7 + 5 =

By adding 7 with 5 we get 12

Question 26.
5 + 8 =

By adding 5 with 8 we get 13

Question 27.
8 + 3 =

By adding 8 with 3 we get 11

Question 28.
6 + 8 =

By adding 6 with 8 we get 14

Question 29.
4 + 6 =

By adding 4 with 6 we get 10

Question 30.
7 + 6 =

By adding 7 with 6 we get 13

Question 31.
7 + 4 =

By adding 7 with 4 we get 11

Question 32.
7 + 9 =

By adding 7 with 9 we get 16

Question 33.
7 + 7 =

By adding 7 with 7 we get 14

Question 34.
8 + 6 =

By adding 8 with 6 we get 14

Question 35.
6 + 9 =

By adding 6 with 9 we get 15

Question 36.
8 + 5 =

By adding 8 with 5 we get 13

Question 37.
4 + 7 =

By adding 4 with 7 we get 11

Question 38.
3 + 9 =

By adding 3 with 9 we get 12

Question 39.
8 + 6 =

By adding 8 with 6 we get 14

Question 40.
9 + 4 =

By adding 9 with 4 we get 13

### Eureka Math Grade 2 Module 8 Lesson 3 Core Fluency Practice Set B Answer Key

Question 1.
10 + 8 =

By adding 10 with 9 we get 19

Question 2.
4 + 10 =

By adding 10 with 9 we get 19

Question 3.
9 + 10 =

By adding 10 with 9 we get 19

Question 4.
11 + 5 =

By adding 10 with 9 we get 19

Question 5.
13 + 3 =

By adding 10 with 9 we get 19

Question 6.
12 + 4 =

By adding 10 with 9 we get 19

Question 7.
16 + 3 =

By adding 10 with 9 we get 19

Question 8.
15 + = 19

By adding 10 with 9 we get 19

Question 9.
18 + = 20

By adding 10 with 9 we get 19

Question 10.
13 + 5 =

By adding 10 with 9 we get 19

Question 11.
____ = 4 + 16

By adding 10 with 9 we get 19

Question 12.
____ = 6 + 12

By adding 10 with 9 we get 19

Question 13.
____ = 14 + 6

By adding 10 with 9 we get 19

Question 14.
9 + 3 =

By adding 10 with 9 we get 19

Question 15.
7 + 9 =

By adding 10 with 9 we get 19

Question 16.
____ + 4 = 11

By adding 10 with 9 we get 19

Question 17.
____ + 6 = 13

By adding 10 with 9 we get 19

Question 18.
____ + 5 = 12

By adding 10 with 9 we get 19

Question 19.
____ + 8 = 14

By adding 10 with 9 we get 19

Question 20.
____ + 9 = 15

By adding 10 with 9 we get 19

Question 21.
5 + 8 =

By adding 10 with 9 we get 19

Question 22.
6 + 7 =

By adding 10 with 9 we get 19

Question 23.
____ + 4 = 12

By adding 10 with 9 we get 19

Question 24.
____ + 7 = 13

By adding 10 with 9 we get 19

25.
6 + ____ = 14

By adding 10 with 9 we get 19

Question 26.
7 + _____ = 15

By adding 10 with 9 we get 19

Question 27.
____ = 9 + 8

By adding 10 with 9 we get 19

Question 28.
____ = 7 + 5

By adding 10 with 9 we get 19

Question 29.
____ = 4 + 8

By adding 10 with 9 we get 19

Question 30.
3 + 9 =

By adding 10 with 9 we get 19

Question 31.
6 + 7 =

By adding 10 with 9 we get 19

Question 32.
8 + _____ = 13

By adding 10 with 9 we get 19

Question 33.
____ = 7 + 9

By adding 10 with 9 we get 19

Question 34.
6 + 6 =

By adding 10 with 9 we get 19

Question 35.
____ = 7 + 5

By adding 10 with 9 we get 19

Question 36.
____ = 4 + 8

By adding 10 with 9 we get 19

Question 37.
20 = 13 + ____

By adding 10 with 9 we get 19

Question 38.
18 = _____ + 9

By adding 10 with 9 we get 19

Question 39.
16 = ____ + 7

By adding 10 with 9 we get 19

Question 40.
20 = 9 + ____

By adding 10 with 9 we get 19

### Eureka Math Grade 2 Module 8 Lesson 3 Core Fluency Practice Set C Answer Key

Question 1.
19 – 9 =

By subtracting 19 with 9 we get 10

Question 2.
19 – 11 =

By subtracting 19 with 9 we get 10

Question 3.
17 – 10 =

By subtracting 19 with 9 we get 10

Question 4.
12 – 2 =

By subtracting 19 with 9 we get 10

Question 5.
15 – 12 =

By subtracting 19 with 9 we get 10

Question 6.
18 – 10 =

By subtracting 19 with 9 we get 10

Question 7.
17 – 5 =

By subtracting 19 with 9 we get 10

Question 8.
20 – 9 =

By subtracting 19 with 9 we get 10

Question 9.
14 – 4 =

By subtracting 19 with 9 we get 10

Question 10.
16 – 13 =

By subtracting 19 with 9 we get 10

Question 11.
11 – 2 =

By subtracting 19 with 9 we get 10

Question 12.
12 – 3 =

By subtracting 19 with 9 we get 10

Question 13.
14 – 2 =

By subtracting 19 with 9 we get 10

Question 14.
13 – 4 =

By subtracting 19 with 9 we get 10

Question 15.
11 – 3 =

By subtracting 19 with 9 we get 10

Question 16.
12 – 4 =

By subtracting 19 with 9 we get 10

Question 17.
13 – 2 =

By subtracting 19 with 9 we get 10

Question 18.
14 – 5 =

By subtracting 19 with 9 we get 10

Question 19.
11 – 4 =

By subtracting 19 with 9 we get 10

Question 20.
12 – 5 =

By subtracting 19 with 9 we get 10

Question 21.
15 – 7 =

By subtracting 19 with 9 we get 10

Question 22.
18 – 9 =

By subtracting 19 with 9 we get 10

Question 23.
16 – 8 =

By subtracting 19 with 9 we get 10

Question 24.
15 – 6 =

By subtracting 19 with 9 we get 10

Question 25.
17 – 8 =

By subtracting 19 with 9 we get 10

Question 26.
14 – 6 =

By subtracting 19 with 9 we get 10

Question 27.
16 – 9 =

By subtracting 19 with 9 we get 10

Question 28.
13 – 8 =

By subtracting 19 with 9 we get 10

Question 29.
12 – 5 =

By subtracting 19 with 9 we get 10

Question 30.
19 – 8 =

By subtracting 19 with 9 we get 10

Question 31.
17 – 9 =

By subtracting 19 with 9 we get 10

Question 32.
16 – 7 =

By subtracting 19 with 9 we get 10

Question 33.
14 – 8 =

By subtracting 19 with 9 we get 10

Question 34.
15 – 9 =

By subtracting 19 with 9 we get 10

Question 35.
13 – 7 =

By subtracting 19 with 9 we get 10

Question 36.
12 – 8 =

By subtracting 19 with 9 we get 10

Question 37.
15 – 8 =

By subtracting 19 with 9 we get 10

Question 38.
14 – 9 =

By subtracting 19 with 9 we get 10

Question 39.
12 – 7 =

By subtracting 19 with 9 we get 10

Question 40.
11 – 9 =

By subtracting 19 with 9 we get 10

### Eureka Math Grade 2 Module 8 Lesson 3 Core Fluency Practice Set D Answer Key

Question 1.
12 – 3 =

By subtracting 19 with 9 we get 10

Question 2.
13 – 5 =

By subtracting 19 with 9 we get 10

Question 3.
11 – 2 =

By subtracting 19 with 9 we get 10

Question 4.
12 – 5 =

By subtracting 19 with 9 we get 10

Question 5.
13 – 4 =

By subtracting 19 with 9 we get 10

Question 6.
13 – 2 =

By subtracting 19 with 9 we get 10

Question 7.
11 – 4 =

By subtracting 19 with 9 we get 10

Question 8.
12 – 6 =

By subtracting 19 with 9 we get 10

Question 9.
11 – 3 =

By subtracting 19 with 9 we get 10

Question 10.
13 – 6 =

By subtracting 19 with 9 we get 10

Question 11.
____ = 11 – 9

By subtracting 19 with 9 we get 10

Question 12.
____ = 13 – 8

By subtracting 19 with 9 we get 10

Question 13.
____ = 12 – 7

By subtracting 19 with 9 we get 10

Question 14.
____ = 11 – 6

By subtracting 19 with 9 we get 10

Question 15.
____ = 13 – 9

By subtracting 19 with 9 we get 10

Question 16.
____ = 14 – 8

By subtracting 19 with 9 we get 10

Question 17.
____ = 11 – 7

By subtracting 19 with 9 we get 10

Question 18.
____ = 15 – 6

By subtracting 19 with 9 we get 10

Question 19.
____ = 16 – 9

By subtracting 19 with 9 we get 10

Question 20.
____ = 12 – 8

By subtracting 19 with 9 we get 10

Question 21.
13 – 7 =

By subtracting 19 with 9 we get 10

Question 22.
15 – 9 =

By subtracting 19 with 9 we get 10

Question 23.
18 – 7 =

By subtracting 19 with 9 we get 10

Question 24.
14 – 7 =

By subtracting 19 with 9 we get 10

Question 25.
17 – 9 =

By subtracting 19 with 9 we get 10

Question 26.
12 – 9 =

By subtracting 19 with 9 we get 10

Question 27.
13 – 6 =

By subtracting 19 with 9 we get 10

Question 28.
15 – 7 =

By subtracting 19 with 9 we get 10

Question 29.
16 – 8 =

By subtracting 19 with 9 we get 10

Question 30.
12 – 6 =

By subtracting 19 with 9 we get 10

Question 31.
____ = 13 – 9

By subtracting 19 with 9 we get 10

Question 32.
____ = 17 – 8

By subtracting 19 with 9 we get 10

Question 33.
____ = 14 – 9

By subtracting 19 with 9 we get 10

Question 34.
____ = 13 – 5

By subtracting 19 with 9 we get 10

Question 35.
____ = 15 – 8

By subtracting 19 with 9 we get 10

Question 36.
____ = 18 – 9

By subtracting 19 with 9 we get 10

Question 37.
____ = 16 – 7

By subtracting 19 with 9 we get 10

Question 38.
____ = 20 – 12

By subtracting 19 with 9 we get 10

Question 39.
____ = 20 – 6

By subtracting 19 with 9 we get 10

Question 40.
____ = 20 – 17

By subtracting 19 with 9 we get 10

### Eureka Math Grade 2 Module 8 Lesson 3 Core Fluency Practice Set E Answer Key

Question 1.
13 – 4 =

By subtracting 19 with 9 we get 10

Question 2.
15 – 8 =

By subtracting 19 with 9 we get 10

Question 3.
19 – 5 =

By subtracting 19 with 9 we get 10

Question 4.
11 – 7 =

By subtracting 19 with 9 we get 10

Question 5.
9 + 6 =

By adding 19 with 9 we get 10

Question 6.
7 + 8 =

By adding 19 with 9 we get 10

Question 7.
4 + 7 =

By adding 19 with 9 we get 10

Question 8.
13 + 6 =

By adding 19 with 9 we get 10

Question 9.
12 – 8 =

By subtracting 12 with 8 we get 4

Question 10.
17 – 9 =

By subtracting 12 with 8 we get 4

Question 11.
14 – 6 =

By subtracting 12 with 8 we get 4

Question 12.
16 – 7 =

By subtracting 12 with 8 we get 4

Question 13.
6 + 8 =

By adding 19 with 9 we get 10

Question 14.
7 + 6 =

By adding 19 with 9 we get 10

Question 15.
4 + 9 =

By adding 19 with 9 we get 10

Question 16.
5 + 7 =

By adding 19 with 9 we get 10

Question 17.
9 – 5 =

By subtracting 12 with 8 we get 4

Question 18.
13 – 7 =

By subtracting 12 with 8 we get 4

Question 19.
16 – 9 =

By subtracting 12 with 8 we get 4

Question 20.
14 – 8 =

By subtracting 12 with 8 we get 4

Question 21.
8 + 4 =

By adding 19 with 9 we get 10

Question 22.
6 + 7 =

By adding 19 with 9 we get 10

Question 23.
9 + 9 =

By adding 19 with 9 we get 10

Question 24.
12 – 6 =

By subtracting 12 with 8 we get 4

Question 25.
16 – 7 =

By subtracting 12 with 8 we get 4

Question 26.
13 – 5 =

By subtracting 12 with 8 we get 4

Question 27.
11 – 8 =

By subtracting 12 with 8 we get 4

Question 28.
7 + 9 =

By adding 19 with 9 we get 10

Question 29.
5 + 7 =

By adding 19 with 9 we get 10

Question 30.
8 + 7 =

By adding 19 with 9 we get 10

Question 31.
9 + 8 =

By adding 19 with 9 we get 10

Question 32.
11 + 9 =

By adding 19 with 9 we get 10

Question 33.
12 – 3 =

By subtracting 12 with 8 we get 4

Question 34.
14 – 5 =

By subtracting 12 with 8 we get 4

Question 35.
20 – 13 =

By subtracting 12 with 8 we get 4

Question 36.
8 – 5 =

By subtracting 12 with 8 we get 4

Question 37.
7 + 4 =

By adding 19 with 9 we get 10

Question 38.
13 + 5 =

By adding 19 with 9 we get 10

Question 39.
7 + 9 =

By adding 19 with 9 we get 10

Question 40.
8 + 11 =

By adding 19 with 9 we get 10

### Eureka Math Grade 2 Module 8 Lesson 3 Problem Set Answer Key

Question 1.
Use a straightedge to draw the polygon with the given attributes in the space to the right.

a.
Draw a polygon with 3 angles.
Number of sides: ______
Name of polygon: ______

b.
Draw a five-sided polygon.
Number of angles: ______
Name of polygon: ______

c.
Draw a polygon with 4 angles.
Number of sides: ______
Name of polygon: ______

d.
Draw a six-sided polygon.
Number of angles: ______
Name of polygon: ______

e.
Compare your polygons to those of your partner. Copy one example that is very different from your own in the space to the right.

Question 2.
Use your straightedge to draw 2 new examples of each polygon that are different from those you drew on the first page.

a. Triangle

b. Pentagon

d. Hexagon

### Eureka Math Grade 2 Module 8 Lesson 3 Homework Answer Key

Use a straightedge to draw the polygon with the given attributes in the space to the right.

Question:
Draw a five-sided polygon.
Number of angles: ______
Name of polygon: _______

Question 1.
Use a straightedge to draw the polygon with the given attributes in the space to the right.

a.
Draw a polygon with 4 angles.
Number of sides: ______
Name of polygon: ______

b.
Draw a six-sided polygon.
Number of angles: ______
Name of polygon: ______

c.
Draw a polygon with 3 angles.
Number of sides: ______
Name of polygon: ______

d.
Draw a five-sided polygon.
Number of angles: ______
Name of polygon: ______

Question 2.
Use your straightedge to draw 2 new examples of each polygon that are different from those you drew on the first page.