Subtraction is the process of taking one number away from another. For example, in the equation $$625 - 400$$ , we are taking 400 away from 625.

Addition is the process of combining two or more numbers to get a total. For example, in the equation $$50 + 10$$ , we are combining 50 and 10 to get 60.

What does the equal sign (=) mean?

The equal sign means that the values on both sides are the same. For example, in $$2 + 3 = 5$$ , both sides equal 5.

What is a number line?

A number line is a straight line with numbers placed at equal intervals. It helps us visualize addition and subtraction.

What is a word problem in math?

A word problem is a math question written in words instead of numbers. It requires understanding the situation to solve it.

What is a math equation?

A math equation is a statement that two expressions are equal. For example, $$x + 2 = 5$$ is an equation.

What is the commutative property of addition?

The commutative property states that changing the order of the numbers in addition does not change the sum. For example, $$3 + 4 = 4 + 3$$ .

What is the associative property of addition?

The associative property states that when adding three or more numbers, the way in which the numbers are grouped does not change the sum. For example, $$(1 + 2) + 3 = 1 + (2 + 3)$$ .

What is a fact family?

A fact family is a group of related addition and subtraction (or multiplication and division) facts using the same numbers. For example, the numbers 2, 3, and 5 can create the facts: $$2 + 3 = 5$$ , $$3 + 2 = 5$$ , $$5 - 2 = 3$$ , $$5 - 3 = 2$$ .

Aimsweb Mental Computation Fluency-3rd Grade Flashcards

Student preview

14 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is subtraction?

Back

Tags

CCSS.2.NBT.B.5

2.

FLASHCARD QUESTION

Front

What is addition?

Back

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

3.

FLASHCARD QUESTION

Front

Back

The result is 225.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

4.

FLASHCARD QUESTION

Front

Back

The result is 60.

Tags

CCSS.2.NBT.B.5

5.

FLASHCARD QUESTION

Front

Back

The result is 825.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

6.

FLASHCARD QUESTION

Front

Back

The result is 200.

Tags

CCSS.1.NBT.C.5

7.

FLASHCARD QUESTION

Front

Back

The result is 375.

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