Unit 2 Addition and Subtraction Test Prep

Write in the number in standard form:

two thousand, one hundred sixty-three

Answer explanation

Remember that standard form is just the number the way we normally write it. 2,163

Tags

CCSS.4.NBT.A.2

Write the number in standard form.

6,000 + 40 =

Answer explanation

Remember that standard form is the way we usually write numbers. 6,040

Tags

CCSS.4.NBT.A.2

Write the number in expanded form.

2578

Answer explanation

Expanded form is the values of each digit separated by plus signs. 2000 + 500 + 70 + 8

Tags

CCSS.4.NBT.A.2

Which digit is in the hundreds place?

3,468

Answer explanation

When it asks what digit is in a particular place, they just want the one number, not its value.

Tags

CCSS.4.NBT.A.1

What is the value of the 5 in the number 5213?

Answer explanation

When it asks about value, they want to know how much that digit is worth.

Tags

CCSS.4.NBT.A.1

Complete the following regular number pattern.

6342, 6442, 6542, ____, ____, ____

• 6653, 7764, 8875

• 6543, 6544, 6545

• 6642, 6742, 6842

Answer explanation

Find what is changing every time and then continue the pattern by changing only that one part.

6642, 6742, 6842

Tags

CCSS.4.OA.C.5

What is the missing number in the following pattern?

3098, ____, 5098, 6098, 7098

Answer explanation

Remember to find the one part that is changing every time and then find the part of the pattern that is missing.

4098

Tags

CCSS.4.OA.C.5

What is the sum of 90 and 54?

Answer explanation

Remember that sum is the answer to an addition problem. We are trying to find a whole. To find a whole, we add.

90 + 54 = 114

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the difference between 90 and 54?

Answer explanation

Remember that difference is the answer to a subtraction problem. We are trying to find a part. To find a part, we subtract.

90 - 54 = 36

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Find the missing number.

___ + 34 = 87

Answer explanation

Try to label the parts or make a bar model so that you can see if you are trying to find a part or a whole. This time we were trying to find a part. To find a part, we subtract.

87 - 34 = 53

Tags

CCSS.1.OA.D.8