Midd - Math module 4

Front

What is place value?

Back

Place value is the value of a digit based on its position in a number. For example, in the number 31, the '3' is in the tens place and represents 30, while the '1' is in the ones place and represents 1.

Front

Is 31 - 12 equal to 12 + 31?

Back

False. 31 - 12 equals 19, while 12 + 31 equals 43.

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 does subtracting a negative number mean?

Back

Subtracting a negative number is the same as adding a positive number. For example, 10 - (-2) is the same as 10 + 2.

Front

What is the arrow strategy in math?

Back

The arrow strategy is a visual method used to help with subtraction by drawing arrows to represent the steps taken to reach the answer.

Front

What is the result of 65 - 28?

Back

The result is 37.

Front

What is a number line?

Back

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

Front

What does it mean to show your work in math?

Back

Showing your work means writing down the steps you took to solve a problem, which helps others understand your thought process.

Front

What is the difference between addition and subtraction?

Back

Addition is combining two or more numbers to get a total, while subtraction is taking one number away from another.

Front

What is a strategy for solving subtraction problems?

Back

One strategy is to break the numbers into smaller parts, such as using place value to subtract tens and ones separately.