Vocabulary Check
Find the Sum
Problem Solving
Round
100
The sum of any number and 0 equals the number.
4 + 0 = 4
Identity Property of Addition
100
3.15 + 1.2 = _____
4.35
100
What is the combined cost of the sweatshirt and hat shown?
$44.89
100
Round 456.791 to the nearest tenth.
456.8
200
The order in which numbers are added does not change the sum.
4 + 3 + 5 = 3 + 5 + 4
Commutative Property of Addition
200
68.9 + 7.1 = _____
76
76.0
200
Francis earned the following scores on his math quizzes: 86, 84, 90. Jillian earned the following scores on her math quizzes: 84, 90, 86. Who earned a greater total score? Which addition property can you use to find the answer?
86 + 84 + 90 = ____
84 + 90 + 86 = ____
Francis and Jillian earned exactly the same total score. You can use the Commutative Property of Addition.
200
Round 456.791 to the nearest one.
457
300
The way in which numbers are grouped does not change the sum.
(25 + 12) + 8 = 25 + (12 + 8)
Associative Property of Addition
300
4.67 + 1.70 = ______
6.37
300
Dean received the following amounts for mowing his neighbors' lawns: $12.34, $16.75, $20.66, $33.25.
Use mental math to find the total amount earned.
$12.34 + $20.66 = $33
$16.75 + $33.25 = $50
$83
300
Round 456.791 to the nearest hundredth.
456.79
400
Which addition property is being used in the example?
7.45 + 0 = 7.45
Identity Property of Addition
400
25.39 + 18.68 = ______
44.07
400
Tammy made a bracelet using red, white, and blue string. The red string is 2.4 centimeters long, the white string is 2.1 centimeters, and the blue string is 2.6 centimeters long. What is the total length of the three strings?
7.1 centimeters
400
Round 456.791 to the nearest hundred.
500
500
Which addition property is being used in the example?
16 + 57 + 43 = 57 + 43 + 16
Commutative Property of Addition
500
Add this mentally. Use a property of addition.
37 + 58 = _____
(30 + 50) + (7 + 8)
30 + 50 = 80
7 + 8 = 15
95
I used the Associative Property of Addition and the Commutative Property of Addition.