Addition and Subtraction to 20

Front

What is the result of subtracting 13 from 17?

Back

4 ducks are left in the pond.

Front

What is 6 + 7?

Back

13

Front

If Ms. Hurt had 19 students and 2 more joined, how many students does she have now?

Back

21 students.

Front

What is the sum of 10, 2, and 5?

Back

17.

Front

What is 15 + 5?

Back

20.

Front

What is the definition of addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is the definition of subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Front

What is the commutative property of addition?

Back

The commutative property states that changing the order of the addends does not change the sum.

Front

What is the associative property of addition?

Back

The associative property states that the way in which numbers are grouped in addition does not change the sum.

Front

What is a word problem in mathematics?

Back

A word problem is a mathematical problem expressed in words, requiring interpretation and problem-solving skills.