Vocabulary
A number sentence with an equal sign.
What is an equation?
25 + 32 =
What is 57?
21 + 5=
The students read 52 books last month. They read 33 this month. Estimate the number of pages the students read in all.
What is 80 books?
What is 0+(insert any number) = (same number)
To figure a close answer to.
What is estimation?
276 + 312 =
What is 588?
100 + 25=
What is 125?
The farmer had 16 cows. He bought 8 more. ABOUT how many cows does the farmer have now?
About 30 cows.
Choose the problem in which would you use the Order Property of Addition
13+3=16, so 3+13=____
13+3=16, so 16+3=_____
What is 13+3=16, so 3+13=16
Adding numbers in your mind without using pencil and paper or a calculator.
What is mental math?
86 + 81 =
What is 167?
58+8=
What is 66?
What is 300 chicken minis?
When would you use the Grouping Property of Addition?
adding a column of addends
adding facts to 18
rounding
What is adding a column of addends?
A set of related addition and subtraction facts.
What is a fact family?
859 + 173=
What is 1,032?
32 + 8=
What is 40?
The boys in Mrs. Roxas' class drew 13 pictures for her wall. The girls in Mrs. Roxas' class drew 18 pictures for her wall. How many pictures did Mrs. Roxas have in all?
What is 41 pictures?
This strategy is used in estimation.
What is rounding?
The answer to an addition problem.
What is a sum?
2,648 + 1,566 =
What is 4,214?
225 + 100=
What is 325?
There are 40 students in third grade, 32 students in fourth grade, and 39 students in fifth grade. How many students are in the 3-5 hallways at Grace Christian School?
What is 111 students?
Solve:
5,267,895 + 8,759,123
What is 14,027,018?