Mental math addition and subtraction

Front

What is mental math?

Back

Mental math is the ability to perform calculations in your head without using a calculator or paper.

Tags

CCSS.2.NBT.B.5

Front

What does addition mean?

Back

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

Front

What does subtraction mean?

Back

Subtraction is the process of taking one number away from another.

Front

What is the sum of 25 and 30?

Back

55

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the sum of 62 and 18?

Back

80

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the sum of 37 and 23?

Back

60

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the sum of 32 and 25?

Back

57

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is 58 minus 25?

Back

33

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, used to represent numbers visually.

Tags

CCSS.2.MD.B.6

Front

What is a double number?

Back

A double number is when you add a number to itself, like 4 + 4 = 8.

Tags

CCSS.2.OA.C.3