## Math Expressions Common Core Grade 2 Unit 2 Lesson 3 Answer Key Represent Numbers in Different Ways

**Math Expressions Grade 2 Unit 2 Lesson 3 Homework**

**Draw the number using hundred boxes, ten sticks, and circles. Then write the expanded form.**

Question 1.

176

100 + 70 + 6

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

Question 2.

143

______ + ______ + ______

Answer:

100 + 40 + 3

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

Question 3.

184

______ + ______ + ______

Answer:

100 + 80 + 4

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

**What number is shown? H = Hundreds, T Tens, O = Ones**

Question 4.

Question 5.

Answer: 163

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

Question 6.

Answer: 132

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

Question 7.

Answer: 117

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place

**Math Expressions Grade 2 Unit 2 Lesson 3 Remembering**

**Write the unknown addend (partner).**

Question 1.

5 + ________ = 15

17 – 9 = ________

7 + ________ = 11

Answer:

unknown addends are 10, 8 and 4

5 + 10 = 15

17 – 9 = 8

7 + 4 = 11

Explanation:

An addend is a number that is added to another.

If given an equation with a missing addend, the missing addend can be found as long as one addend and the sum (the result of combining the two addends) are given.

If one addend and the sum are given, take the addend and subtract it from the sum.

Question 2.

6 + ________ = 14

16 – 7 = ________

3 + ________ = 11

Answer:

unknown addends are 8, 9 and 8

6 + 8 = 14

16 – 7 = 9

3 + 8 = 11

Explanation:

An addend is a number that is added to another.

If given an equation with a missing addend, the missing addend can be found as long as one addend and the sum (the result of combining the two addends) are given.

Question 3.

7 + ________ = 15

12 – 7 = ________

6 + ________ = 15

Answer:

unknown addends are 8, 5 and 9

7 + 8 = 15

12 – 7 = 5

6 + 9 = 15

Explanation:

An addend is a number that is added to another.

If given an equation with a missing addend, the missing addend can be found as long as one addend and the sum (the result of combining the two addends) are given.

If one addend and the sum are given, take the addend and subtract it from the sum.

To find the unknown addends one should use math mountain.

**Complete the addition doubles equation.**

Question 4.

________ + ________ = 16

Answer: 8

Explanation:

8 + 8 = 16

To get a double of a number, we add the same number to itself.

Question 5.

________ + ________ = 10

Answer: 5

5 + 5 = 10

Explanation:

To get a double of a number, we add the same number to itself.

Question 6.

________ + ________ = 8

Answer: 4

4 + 4 = 8

Explanation:

To get a double of a number, we add the same number to itself.

Question 7.

________ + ________ = 14

Answer: 7

7 + 7 = 14

Explanation:

To get a double of a number, we add the same number to itself.

Question 8.

________ + ________ = 12

Answer: 6

6 + 6 = 12

Explanation:

To get a double of a number, we add the same number to itself.

Question 9.

________ + ________ = 18

Answer: 9

9 + 9 = 18

Explanation:

To get a double of a number, we add the same number to itself.

Question 10.

**Stretch Your Thinking** Show 194 two different ways.

Answer:

100 + 90 + 4

1 H + 9 T + 4 O

Explanation:

one blue box consists of 100 small boxes = 100, H place

one brown stick consists of 10 small stick = 10, T place

one green circle is once place