Subtracting double digits with regrouping

Front

What is regrouping in subtraction?

Back

Regrouping is when you rearrange numbers to make subtraction easier, especially when the top number is smaller than the bottom number in a column.

Front

What does it mean to subtract double digits?

Back

Subtracting double digits means taking away a two-digit number from another two-digit number.

Front

What is the first step in subtracting double digits with regrouping?

Back

The first step is to line up the numbers by place value (ones under ones, tens under tens).

Front

How do you subtract the ones place?

Back

Subtract the number in the ones place of the bottom number from the number in the ones place of the top number.

Front

What do you do if the top number in the ones place is smaller than the bottom number?

Back

You need to regroup from the tens place, borrowing 1 ten to make the ones place larger.

Front

If you have 93 - 21, what do you do first?

Back

First, line up the numbers: 93 on top and 21 below it.

Front

What is 93 - 21?

Back

93 - 21 = 72.

Front

What is 94 - 45?

Back

94 - 45 = 49.

Front

What is 36 - 18?

Back

36 - 18 = 18.

Front

What is 59 - 23?

Back

59 - 23 = 36.