Math Vocabulary
Properties
Addition
Subtract
100
When you _________, you break apart a number into smaller pieces.
a.Decompose
b.Estimate
c. Round
Decompose
100
Which is the standard form of three thousand, eight hundred forty?
3,840
100
506+472
978
100
789-367
422
200
You can __________ an answer when you do not need an exact one.
a. estimate
b. round
c. expanded form
a. estimate
200
Fill in the blank:
78+___+212 = 418+212+78
418
200
Sasha spent 284 minutes swimming the first week and 247 minutes walking the second week. What is an estimate of the total tome Sasha spent swimming?
500 or 530
200
Stephen spends 456 minutes baking pie the first week. The second week he spends 397 minutes baking cookies. How many more minutes did Stephen spend baking pie compared to cookies?
59 minutes
300
When you ________ a number, you find a number with one that is close to the original.
a. estimate
b. round
c. decompose
b. round
300
Fill in the blank:
289+621+98+1=1+98+289+______
621
300
Gabe is trying to solve 246 + 367. Which equation shows how he could adjust the the numbers to find the sum?
a. 250+360
b. 250+370
c. 250+363
d. 250+371
c. 250+363
300
Which of the following equations can you use to solve this subtraction equation?
836 − 377 = ?
a. 377+459=836
b. 459-377=836
c. 459-836=377
d. 836+459=377
A: 377+459=836
400
The representation of a number as a sum the values of each digit is called ___________.
a. estimate
b. round
c. expanded form
c. expanded form
400
The sum of an odd number and an even number will always be ___________.
Odd
400
Use the diagram to help you find the missing number
231
400
Decompose to help find the difference.
369-228=?
300-200= 100
60-20=40
9-8=1
141
500
A ________________ is a number that is close to a number but is easy to work with.
a. expanded form
b. rounding
c. compatible number
C. compatible number
500
The sum of two numbers that are both odd will always be ____________.
Even
500
Decompose to help find the answer.
657+238
600+200=800
50+30=80
7+8=15
895
500
Use the diagram to help you find the missing number
(HINT: use the big number and subtract the small number)
231