2-Digit Mental Math

Front

Subtract using mental math: 62 - 20 = ?

Back

42

Front

Add using mental math: 72 + 15 = ?

Back

87

Front

Add using mental math: 84 + 12 = ?

Back

96

Front

Add using mental math: 44 + 22 = ?

Back

66

Front

Add using mental math: 25 + 14 = ?

Back

39

Front

What is mental math?

Back

Mental math is doing calculations in your head without using paper or a calculator.

Front

What is the sum of two numbers?

Back

The sum is the result of adding two or more numbers together.

Front

What is the difference in subtraction?

Back

The difference is the result of subtracting one number from another.

Front

If you add 10 to a number, what happens?

Back

The number increases by 10.

Front

If you subtract 10 from a number, what happens?

Back

The number decreases by 10.