Mental Math strategies

Front

23 + 99 = 100 + ____________

Back

22

Front

Finding the difference means ____________________

Back

subtract

Front

Jenny has $10 less than John. John has $65. How much money does Jenny have?

Back

55

Front

Find the difference between 18 and 67.

Back

49

Front

Find the sum of 200 and 189.

Back

389

Front

What is mental math?

Back

Doing math in your head without writing it down.

Front

What is addition?

Back

Combining two or more numbers to get a total.

Front

What is subtraction?

Back

Taking one number away from another.

Front

What is the sum of 5 and 7?

Back

12

Front

What is the difference between 10 and 4?

Back

6