Mental Math-Addition and Subtraction

Front

What is the sum of 98 and 612?

Back

710

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of adding 151 and 6?

Back

157

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What do you get when you subtract 5 from 443?

Back

438

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is 124 minus 40?

Back

84

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of subtracting 99 from 500?

Back

401

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is mental math?

Back

Mental math refers to performing calculations in your head without the use of calculators or paper.

Tags

CCSS.2.OA.B.2

CCSS.1.OA.C.6

Front

What is the commutative property of addition?

Back

The commutative property of addition states that changing the order of the addends does not change the sum (e.g., a + b = b + a).

Tags

CCSS.1.OA.B.3

Front

What is the associative property of addition?

Back

The associative property of addition states that the way in which numbers are grouped does not change their sum (e.g., (a + b) + c = a + (b + c)).

Tags

CCSS.1.OA.B.3

Front

What is the difference between addition and subtraction?

Back

Addition is the process of finding the total or sum by combining numbers, while subtraction is the process of finding the difference by taking one number away from another.

Tags

CCSS.1.OA.A.1

Front

How can you check your addition?

Back

You can check your addition by using the inverse operation of subtraction to see if the sum matches the original numbers.

Tags

CCSS.1.OA.A.1