Vocabulary
What is mental math?
Solve:
34 + 13
What is 47?
Round the addends to the nearest 10 and estimate the sum.
39 + 47
What is 90?
What addition strategy is shown below?
8 + 8=16
What is doubles?
Solve:
3
2
+ 2
What is 7?
A number sentence with an equals sign.
What is an equation?
Solve:
204 + 135
What is 339?
Round the addends to the nearest hundred and estimate the sum.
129 + 285
What is 400?
What is zero property of addition?
Solve:
84 + 69 + 56
What is 209?
A set of related addition and subtraction facts.
Solve:
277 + 135
What is 412?
Round the addends to the nearest hundred and estimate the sum.
678 + 204
What is 900?
Name the addition strategy shown below:
8 + 2 + 5 = 10 + 5= 15
What is make a ten?
solve:
18 + 64 + 52
What is 134?
A number sentence with an equals sign.
What is an equation?
Solve:
2, 466 + 356
What is 2, 822
Solve.
The students in 3rd grade lost 24 pencils on Monday. They lost 17 pencils on Tuesday. About how many books did they read in all? Solve by estimation.
What is 40?
The property of addition that says 7 + 8 = 15 and 8 + 7 = 15
What is the order property of addition?
Solve:
213 + 537 + 628
What is 1, 378?
A graph that uses pictures or symbols to show data.
What is a pictograph?
Solve:
4, 679 + 3, 450
What is 8, 129?
In one week, the students read 139 fiction books and 189 nonfiction books. Estimate the number of books read altogether.
What is 328?
Switching the order of addends does not change the sum. For example: 7 + 5 + 2 = 14 and 7 + 2 + 5 = 14.
What is the Grouping Property of Addition?
Solve:
The rabbits that Jeremy raises are sold to pet shops. Last year Jeremy sold 43 rabbits to Friendly Pets, 21 rabbits to Happy Pet Shop, and 18 rabbits to Gentle Pets. How many rabbits did Jeremy sell last year?
What is 82 rabbits?