Go through the **Spectrum Math Grade 2 Answer Key Chapter 2 Pretest **and get the proper assistance needed during your homework.

## Spectrum Math Grade 2 Chapter 2 Pretest Answers Key

**Add.**

Answer:

The answer is 16.

Explanation:

Let us add 7 and 9.

Add 7 ones and 9 ones.

7 ones + 9 ones = 16 ones.

16 ones = 1 ten + 6 ones

Write 6 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 5.

Explanation:

Let us add 2 and 3.

Add 2 ones and 3 ones.

2 ones + 3 ones = 5 ones. The answer is 5.

Answer:

The answer is 2.

Explanation:

Let us add 0 and 2.

Add 0 ones and 2 ones.

0 ones + 2 ones = 2 ones.

The answer is 2.

Answer:

11

Explanation:

Let us add 3 and 8.

Add 3 ones and 8 ones.

3 ones + 8 ones = 11 ones.

11 ones = 1 ten + 1 ones

Write 1 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 7.

Explanation:

Let us add 5 and 2.

Add 5 ones and 2 ones.

5 ones + 2 ones = 7 ones.

The answer is 7.

Answer:

15

Explanation:

Let us add 7 and 8.

Add 7 ones and 8 ones.

7 ones + 8 ones = 15 ones.

15 ones = 1 ten + 5 ones

Write 5 in one’s place and carry 1 ten to ten’s place.

Answer:

8

Explanation:

Let us add 4 and 4.

Add 4 ones and 4 ones.

4 ones + 4 ones = 8 ones.

The answer is 8.

Answer:

The answer is 19.

Explanation:

Let us add 18 and 1.

Add 8 ones and 1 ones.

8 ones + 1 ones = 9 ones.

1 ten + 1 carry = 2 ten’s

Write 9 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 12.

Explanation:

Let us add 8 and 4.

Add 8 ones and 4 ones.

8 ones + 4 ones = 12 ones.

12 ones = 1 ten + 2 ones

Write 2 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 4.

Explanation:

Let us add 3 and 1.

Add 3 ones and 1 one’s.

3 ones + 1 ones = 4 ones.

The answer is 4.

Answer:

9

Explanation:

Let us add 2 and 7.

Add 2 ones and 7 ones.

2 ones + 7 ones = 9 ones.

The answer is 9.

Answer:

The answer is 17.

Explanation:

Let us add 9 and 8.

Add 9 ones and 8 ones.

9 ones + 8 ones = 17 ones.

17 ones = 1 ten + 7 ones

Write 7 in one’s place and carry 7 ten to ten’s place.

Answer:

3

Explanation:

Let us add 2 and 1.

Add 2 ones and 1 one’s.

2 ones + 1 ones = 3 ones.

13 ones = 1 ten + 3 ones

Write 3 in one’s place. The answer is 3.

Answer:

The answer is 6.

Explanation:

Let us add 6 and 0.

Add 6 + 0 = 6.

Answer:

The answer is 13.

Explanation:

Let us add 7 and 6.

Add 7 ones and 6 ones.

7 ones + 6 ones = 13 ones.

13 ones = 1 ten + 3 ones

Write 3 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 14.

Explanation:

Let us add 5 and 9.

Add 5 ones and 9 ones.

5 ones + 9 ones = 14 ones.

14 ones = 1 ten + 4 ones

Write 4 in one’s place and carry 1 ten to ten’s place.

Answer:

The answer is 20.

Explanation:

Let us add 17 and 3.

Add 7 ones and 3 ones.

7 ones + 3 ones = 10 ones.

1 ten + 1 carry = 2 tens

Write 0 in one’s place and carry 1 ten to ten’s place. The answer is 20.

Answer:

10

Explanation:

Let us add 6 and 4.

Add 6 ones and 4 ones.

6 ones + 4 ones = 10 ones.

10 ones = 1 ten + 0 ones

Write 0 in one’s place and carry 1 ten to ten’s place.

**Subtract.**

Answer:

The subtraction of the given two numbers is 1.

Explanation:

Subtraction means taking one number away from another number.

Let us subtract 4 from 5. The answer is 1.

Answer:

The subtraction of the given two numbers is 7.

Explanation:

Let us subtract 7 from 14.

Now take one number away from another number. 14 – 7 = 7

Answer:

The subtraction of the given two numbers is 2.

Explanation:

Let us subtract 4 from 6.

Now take one number away from another number. 6 – 4 = 2.

Answer:

The subtraction of the given two numbers is 5.

Explanation:

Let us subtract 5 from 10.

Now take one number away from another number. 10 – 5 = 5.

Answer:

The subtraction of the given two numbers is 8.

Explanation:

Let us subtract 5 from 13.

Now take one number away from another number. 13 – 8 = 5.

Answer:

The subtraction of the given two numbers is 9.

Explanation:

Let us subtract 9 from 18.

Now take one number away from another number. 18 – 9 = 9.

Answer:

The subtraction of the given two numbers is 7.

Explanation:

Let us subtract 4 from 11.

Now take one number away from another number. 11 – 4 = 7.

Answer:

The subtraction of the given two numbers is 12.

Explanation:

Let us subtract 7 from 19.

Now take one number away from another number. 19 – 7 = 12.

Answer:

The subtraction of the given two numbers is 3.

Explanation:

Let us subtract 6 from 9.

Now take one number away from another number. 9 – 6 = 3.

Answer:

The subtraction of the given two numbers is 0.

Explanation:

Let us subtract 4 from 4.

Now take one number away from another number. 4 – 4 = 0.

Answer:

The subtraction of the given two numbers is 8.

Explanation:

Let us subtract 8 from 16.

Now take one number away from another number. 16 – 8 = 8.

Answer:

The subtraction of the given two numbers is 6.

Explanation:

Let us subtract 15 from 9.

Now take one number away from another number. 15 – 9 = 6.

Answer:

The subtraction of the given two numbers is 9.

Explanation:

Let us subtract 8 from 17.

Now take one number away from another number. 17 – 8 = 9.

Answer:

The subtraction of the given two numbers is 3.

Explanation:

Let us subtract 5 from 8.

Now take one number away from another number. 8 – 5 = 3.

Answer:

The subtraction of the given two numbers is 3.

Explanation:

Let us subtract 0 from 3.

Now take one number away from another number. 3 – 0 = 3.

Answer:

The subtraction of the given two numbers is 17.

Explanation:

Let us subtract 3 from 20.

Now take one number away from another number. 20 – 3 = 17.

Answer:

The subtraction of the given numbers is 8.

Explanation:

Let us subtract 4 from 12.

Now take one number away from another number. 12 – 4 = 8.

Answer:

The answer is 5.

Explanation:

Let us subtract 2 from 7.

Now take one number away from another number. 7 – 2 = 5.

**Solve each problem.**

Brian borrows 6 books from the library.

Jamal borrows 8 books.

How many books do they borrow in all? _____

Answer:

The total number of books they borrowed is 6 + 8 = 14 books.

Explanation:

Given,

No of the books Brian borrowed from the library = 6

No of books Jamal borrowed = 8

The total number of books they borrowed is 6 + 8 = 14 books.

There are 17 slices of pizza.

8 of them get eaten.

How many slices are left? ____

Answer:

There are 9 slices left.

Explanation:

Given,

No of pizza slices = 17

No of slices got eaten = 8

No of slices left = 17 – 8 = 9 slices.

20 students are in the library.

6 students leave.

How many students are still in the library? _______

Answer:

There are 14 students still in the library.

Explanation:

Given,

The number of students in the library.

The number of students left the library.

The total number of students still in the library is 20 – 6 = 14 students.

Sue borrows 6 books.

If Nina borrows 2 more books than Sue, how many books does Nina borrow? _____

Answer:

There are 8 books Nina borrowed in total.

Explanation:

Given,

Sue borrowed 6 books.

Nina borrowed 2 more books than sue>

The total number of books Nina borrowed is 6 + 2 = 8 books.

There are 8 desks on the first floor.

There are 7 desks on the second floor.

How many desks are there on the two floors? ____

Answer:

There are a total of 15 desks on the two floors.

Explanation:

Given,

No of desks on the first floor is 8

No of desks on the second floor is 7.

We need to find out how many desks are there on the two floors.

So let’s add both the floor’s desk

8 + 7 = 15

Therefore there are a total of 15 desks on the two floors.