adding and subtracting within 20

Front

What is the sum of 6 and 4?

Back

10

Front

What is 1 plus 6?

Back

7

Front

What do you get when you add 11 and 4?

Back

15

Front

What is the result of adding 15 and 2?

Back

17

Front

What is 20 minus 13?

Back

7

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 (e.g., a + b = b + a).

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 (e.g., (a + b) + c = a + (b + c)).

Front

What is the identity property of addition?

Back

The identity property states that the sum of any number and zero is that number (e.g., a + 0 = a).