Adding properties
What is the identity property?
When you add a zero to any number and the sum will equal the original number.
What are addends?
The numbers you add together to get the sum
When do you estimate?
To make the numbers easier to add or subtract
42 + 17=
59
The difference of 46 and and 21 is 25
True
What is the community property?
You can add numbers in any order and get the same answer.
7 + X = 11
4
True or false: when you estimate, 256 is estimated as 250
True or false: the sum of 15 + 56 is 70
89-24=
65
What is the associative property?
You can group the addends in different ways.
X + 8= 12
4
What is the estimated sum of 24 and 15?
40
42 + 29=
71
What is the difference of 782-126?
656
What is the name of the property that allows 23+0 to equal 23?
Identity
6+X=97
91
What is the estimated sum of 745+45?
800
175 + 45=
220
1576-143=
1,433
What is the sum of (5+6)+2?
13
x+4=102
98
A family trip involved driving 731 miles to its first stop and 475 miles to its second. About how many miles did the family travel?
1,200 miles
1,345+4,695=
6,040
Carla buys apples and peaches at the store. The mass of the apples is 724 grams and the mass of the peaches is 471 grams. How much greater is the mass of the peaches?
253