1210_DOL_2.4B

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. It shows how many are left after some are taken away.

Front

What does it mean to 'unbundle' in subtraction?

Back

Unbundling means breaking apart a group of ten to help with subtraction when you don't have enough in one place value.

Front

Solve: 153 − 46 = ?

Back

107

Front

Solve: 118 − 79 = ?

Back

39

Front

If a manager orders 152 bags of chips and sells 67, how many are left?

Back

85 bags of chips are left.

Front

If there are 94 elves and 59 fewer reindeers, how many reindeers are there?

Back

There are 35 reindeers.

Front

What is a place value chart?

Back

A place value chart is a tool that helps us understand the value of each digit in a number based on its position.

Front

What is the value of the digit 5 in the number 153?

Back

In the number 153, the digit 5 is in the tens place, so its value is 50.

Front

What is the first step in solving a subtraction problem?

Back

The first step is to line up the numbers by their place values.

Front

What does 'solve vertically' mean?

Back

'Solve vertically' means to write the numbers one on top of the other, aligning them by place value, to make subtraction easier.