You can regroup 1 ten as _______.

• 10 ones

• 10 tens

27 is the same as _______.

• 2 ones and 7 tens

• 2 tens and 7 ones

If there are not enough ones to subtract, you _______ to regroup.

• need

• don't need

Addition and subtraction are _______.

• related

• not related

You can check your subtraction with _______.

• multiplication

• addition

You can use a _______ for the unknown number.

• ?

• !

You _______ use place value and regrouping to subtract.

• can

• cannot

To find the difference of 46 - 3, do you need to regroup?

• Yes

• No

To find the difference of 50 - 7, do you need to regroup?

• Yes

• No

To find the difference of 35 - 8, do you need to regroup?

• Yes

• No