All the solutions provided inÂ **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 6 Two-Digit Addition and Subtraction **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 6 Two-Digit Addition and Subtraction

**Essential Question**

How can I add and subtract two-digit numbers?

Answer:

First, add the numbers in the one’s place and write the carry in the tens place. Add the numbers in the tens place to make the sum.

I can subtract two-digit numbers by subtracting the numbers in one place. Next, I will subtract the numbers in the tens place.

**Am I Ready?**

**Write how many tens and ones.**

Question 1.

____________ tens ______________ ones = ______________

Answer:

6 tens 4 ones = 64

Explanation:

There are 6 ten rods and 4 ones cubes

So, 6 tens and 4 ones is 64.

Question 2.

____________ tens ______________ ones = ______________

Answer:

8 tens 6 ones = 86

Explanation:

There are 8 ten rods and 6 ones cubes

So, 8 tens and 6 ones is 86.

**Add.**

Question 3.

9 + 1 = _____________

Answer:

10

Explanation:

The sum of 9 and 1 is 10

So, 9 + 1 = 10.

Question 4.

4 + 2 = _____________

Answer:

6

Explanation:

The sum of 4 and 2 is 6

So, 4 + 2 = 6.

**Subtract.**

Question 5.

6 – 2 = _____________

Answer:

4

Explanation:

The difference of 6 and 2 is 4

So, 6 – 2 = 4.

Question 6.

7 – 6 = ______________

Answer:

1

Explanation:

The difference of 7 and 6 is 1

So, 7 – 6 = 1.

Question 7.

Maggie has 18 stickers. She gives 9 of them away. How many stickers does Maggie have left?

Answer:

9 stickers

Explanation:

Maggie has 18 stickers

She gives 9 of them away

Subtract to find

18 – 9 =

Use doubles fact 9 + 9 = 18

So, 18 – 9 = 9

Therefore, Maggie have 9 stickers left with her.

**My Math Words**

**Review Vocabulary**

add

ones

subtract

tens

Find the sum or difference. Use the review words to complete each sentence.

Answer:

Explanation:

I found the sum and difference and filled the blanks using the review words.

**My Vocabulary Cards**

**Teacher Directions: Ideas for Use**

- Ask students to use the blank cards to write their own vocabulary cords.
- Have students use blank cards to write basic addition and subtraction facts. Have students write the answer on the back of each card.

**My Foldable**

Follow the steps on the back to make your Foldable.

Answer:

Explanation:

I difference of 60 and 20 is 40

The related addition fact is 20 + 40 = 60.