All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 6 Lesson 1 Add Tens will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 1 Answer Key Chapter 6 Lesson 1 Add Tens
Explore and Explain
3 tens + 2 tens = _____________ tens
30 + 20 = ______________
Answer:
Explanation:
3 tens + 2 tens = 7 tens
30 + 20 = 70.
Teacher Directions: Use 
to model. There are 35 people at a baseball game. 3 more people come to the game. How many people are at the game in all? Draw the rods and units that you used. Explain to a classmate how you found the answer.
Answer:
Explanation:
There are 35 people at a baseball game
3 more people come to the game
3 tens = 30
5 ones + 3 ones = 8 ones
So, 35 + 3 = 38.
See and Show
Find 20 + 20 by adding the tens.
Helpful Hint
To find 20 + 20, add 2 tens + 2 tens which equals 4 tens or 40.
Add. Use 
to help.
Question 1.
4 tens + 2 tens = ____________ tens
40 + 20 = ____________
Answer:
Explanation:
4 tens + 2 tens = 60 tens
40 + 20 = 60.
Question 2.
6 tens + 1 ten = ____________ tens
60 + 10 = ____________
Answer:
Explanation:
6 tens + 1 tens = 7 tens
60 + 10 = 7
Question 3.
5 tens + 2 tens = ____________ tens
50 + 20 = ____________
Answer:
Explanation:
5 tens + 2 tens = 7 tens
50 + 20 = 70.
Question 4.
7 tens + 2 tens = ____________ tens
70 + 20 = ____________
Answer:
Explanation:
7 tens + 2 tens = 9 tens
70 + 20 = 90.
Question 5.
8 tens + 1 ten = ____________ tens
80 + 10 = ____________
Answer:
Explanation:
8 tens + 1 tens = 9 tens
80 + 10 = 90.
Talk Math How does knowing 2 + 5 help you find 20 + 50?
Answer:
If you know 2 + 5 you can find 20 + 50 we can add a zero to the sum of 2 and 5
2 + 5 = 7 So, 20 + 50 = 70.