Practice questions available in McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 3 More Adding and Subtracting Through 20 will engage students and is a great way of informal assessment.
McGraw-Hill Math Grade 2 Answer Key Chapter 1 Lesson 3 More Adding and Subtracting Through 20
Add or Subtract
Write the sum or difference.
Question 1.
13 + 7 = 20
20 – 13 = 7
Question 2.
9 + 9 = ___
18 – 9 = ___
Answer:
9 + 9 = 18
18 – 9 = 9
Explanation:
I added to tell how many in all
9 + 9 = 18
I subtracted to tell how many are left
18 – 9 = 9.
Question 3.
11 + 3 = ___
14 – 11 = ___
Answer:
11 + 3 = 14
14 – 11 = 3
Explanation:
I added to tell how many in all
11 + 3 = 14
I subtracted to tell how many are left
14 – 11 = 3.
Question 4.
14 + 2 = ___
16 – 14 = ___
Answer:
14 + 2 = 16
16 – 14 = 2
Explanation:
I added to tell how many in all
14 + 2 = 16
I subtracted to tell how many are left
16 – 14 = 2.
Question 5.
3 + 6 = ___
9 – 6 = ___
Answer:
3 + 6 = 9
9 – 6 = 3
Explanation:
I added to tell how many in all
3 + 6 = 9
I subtracted to tell how many are left
9 – 6 = 3.
Question 6.
5 + 5 = ___
10 – 5 = ___
Answer:
5 + 5 = 10
10 – 5 = 5
Explanation:
I added to tell how many in all
5 + 5 = 10
I subtracted to tell how many are left
10 – 5 = 5.