This property of addition states that the order in which addends are added does not change the sum.
What is the commutative property?
100
A set of numbers that follow a certain order is called a ____________________.
What is a pattern?
100
Round each addend to it's greatest place value and solve:
509 + 391= __________
What is 500 + 400 = 900?
100
In the third grade, 52 students play soccer and 46 students play basketball. What is the total number of students who play these sports?
What is 98 students?
100
3,912 + 1, 999 =
What is 5,911?
200
This property of addition states that when you add zero to a number, the sum is that number.
What is the identity property?
200
________________ show which numbers to add first.
What is parentheses?
200
Charlotte is counting Halloween candy in her bag. She has 14 Snickers, 23 bags of Skittles and 57 pieces of bubblegum. Is it reasonable to say that she has about 90 pieces of candy in her bag?
What is Yes, it is reasonable?
Possible explanation: 14+23+57 = 94. The estimate of 90 is reasonable because it is close to 94.
200
Miranda is 4 years older than her brother Paul and 5 years
younger than her sister Carolyn. If Paul is 5 years old, how old are Miranda and Carolyn?
What is 9 years old (Miranda) and 14 years old (Carolyn)?
200
1,000 more than 6, 791 is ___________.
What is 7,791?
300
This property of addition states that the way addends are grouped does not change the sum.
What is the associative property?
300
This word describes the question mark in the addition sentence:
4,572 + 2, 199 = ?
What is the unknown?
300
Find each sum. Estimate to check for reasonableness.
1,905 + 4,590 = ________
What is 6,495?
Estimate: 1,905 rounds to 1,900
4,590 rounds to 4,600
1,900
+ 4,600
________
6,500
300
Carlos saved $73 in August and $15 in September. How
much money did he save altogether?
What is $88 ?
300
Find the unknown.
3,455; 3,465; ________; 3,485; 3,495
What is 3,475?
400
Name the property of addition that could be used to find the sum.
3 + (_____ + 2) = 2 + (3 + 6)
What is the associative property?
400
When a number makes sense, it is __________________.
What is reasonable?
400
At the scavenger hunt, each team found 82 items. There
were 2 teams. Rounded to the nearest ten, about how many total items were found?
What is about 160 items?
400
Lauren lives 825 miles from the beach. If her family drives to the beach and then home three days later, how many miles did they drive altogether?
What is 1650 miles?
400
Round each addend to the indicated place value.
391 + 621; tens
_____+_______= _______
What is 390+620= 1,010?
500
Danny was solving a problem on his homework.
6 + 4 = ____ + 6
After looking at the problem, Danny decided the unknown was 10:
6 + 4 = 10 + 6.
Help explain Danny's error:
Danny should have used the _____________ property of addition to find the unknown, which is _________.
What is the commutative property of addition and 4?
500
To use place value to exchange equal amounts when renaming a number is called_____________.
What is regrouping?
500
To the nearest ten, what is the
estimated sum of 34 + 149?
What is 180?
500
The Health Center sold 286 bottles of orange juice, 370 bottles of cranberry juice, and 108 bottles of apple juice. About how many total bottles did they sell?
What is 800 bottles?
Explanation: round 764 to the nearest hundred to get about 800 bottles of juice.
500
Manuel has 45 baseball cards, 12 football cards, and 39 basketball cards. Is it reasonable to say that Manuel has about 80 sports cards? Explain.
What is no, it is not reasonable?
Possible explanation: 45 + 12 + 39 = 96. It is not reasonable to say that he has about 80 cards because he actually has closer to 100 cards.