Unit 1 Review

Front

What is subtraction?

Back

Subtraction is taking away a number from another number. For example, if you have 10 apples and you give away 3, you have 7 apples left.

Front

What is an even number?

Back

An even number is a number that can be divided by 2 without any leftovers. Examples include 0, 2, 4, 6, 8.

Front

What is an odd number?

Back

An odd number is a number that cannot be divided by 2 evenly. Examples include 1, 3, 5, 7, 9.

Front

What does it mean to split something evenly?

Back

To split something evenly means to divide it into equal parts. For example, if you have 10 cookies and you split them between 2 friends, each friend gets 5 cookies.

Front

What is a repeated addition?

Back

Repeated addition is adding the same number multiple times. For example, 3 + 3 + 3 is the same as 3 times 3.

Front

What is a double fact?

Back

A double fact is when you add the same number to itself. For example, 4 + 4 = 8.

Front

How do you find the total when adding?

Back

To find the total when adding, you combine the numbers together. For example, 2 + 3 = 5.

Front

What is an array in math?

Back

An array is a way to organize objects in rows and columns. For example, 3 rows of 4 apples make an array of 12 apples.

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals. It helps to visualize addition and subtraction.

Front

What is the concept of 'left' in subtraction?

Back

'Left' in subtraction refers to what remains after taking away a certain amount. For example, if you have 10 and take away 4, you have 6 left.