Adding Two Two-Digit Numbers
24+12
36
17+22
39
The answer to an addition problem.
The sum.
Ms. Volin's class has 15 students. Ms. Pruitt's class has 16 students. How many total students?
31 students
In the number 43, how many tens are there?
4 tens
34+15
49
11+23+45
79
The numbers being added together.
The addends.
Today the students in second grade sold 15 cookies. Yesterday, the students sold 14 cookies. Last week, the second graders sold 27 cookies. How many cookies were sold in all?
56 cookies
What place do you always start with whenever you add or subtract?
The LOWEST place.
42+18
60
15+7+20
42
When you show the values of a number with plus signs.
Expanded form
At the first bus stop, the bus driver picks up 4 students. At the second bus stop, the driver picks up 11 students, and at the final stop 3 students are picked up. How many students are now on the bus?
18 students
What happens whenever you are adding in a place, and your sum is greater than nine?
You have to cross the line, and regroup.
58+64
122
55+10+17
82
When you write a number with only words.
Word form
Mr. Norman has $59. Ms. Ligons also has $59. How much money do they have altogether?
$118
Whenever you see an addition problem, you must do what with your numbers?
You must stack them, and show your thinking.
99+17
116
19+28+59
106
Whenever you exchange ten ones for a ten you __________________.
Regroup
In Ms. Volin's first year, she had 16 students. In her second year, she had fourteen students. Lastly, in her third year, she has 15 students. How many total students has she taught?
45 students
What operation do you use whenever add?
Addition