Mental Math Addition & Subtraction

Front

What is Mental Math?

Back

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

Front

What is Addition?

Back

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

Front

What is Subtraction?

Back

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

Front

What is the sum of 32 and 25?

Back

57

Front

What is the sum of 40 and 15?

Back

55

Front

What is the difference when you subtract 52 from 78?

Back

26

Front

What is the difference when you subtract 20 from 53?

Back

33

Front

What is the difference when you subtract 42 from 66?

Back

24

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, used to represent numbers and perform operations like addition and subtraction.

Front

What does 'carry over' mean in addition?

Back

'Carry over' means to move a value from one column to the next when the sum exceeds the value of that column.