Zero Hero

Zero Hero

I love to eat chocolate!

I ate some of my candy, but I don't want to run out. How can I find out how much candy I have left?

wpeD.jpg (9056 bytes)

Type a sentence in the box that tells how to find out how many pieces of candy I have left.

There were 200 pieces of chocolate candy in my bag. I ate 37 pieces. How many are left?

200
- 37
??

I know how to subtract most numbers, but I don't know how to subtract from zero!

Will you help me?

Step 1:	Step 2:	Step 3:	Step 4:
Regroup the hundreds to make 1 hundred and 10 tens.	Regroup the tens to make 9 tens and 10 ones.	*Subtract the ones.* *Subtract the tens.* Last, subtract the hundreds.	Type the whole answer in the box.

There are 400 pages in the book I’m reading. I’ve read 326. How many more pages do I have to read?

400
-326

If I think about regrouping, I can subtract this!

Step 1:	Step 2:	Step 3:	Step 4:
Regroup the hundreds to make 1 hundred and 10 tens.	Regroup the tens to make 9 tens and 10 ones.	*Subtract the ones.* Subtract the tens. Last, subtract the hundreds.	Type the whole answer in the box.

Now it is your turn to subtract across zero. Look carefully at the example and you can do it!
You need to get your paper and pencil first.

Type the answer under the problem.

600
-239

Example

step1-sub400g.gif (2509 bytes)

Now subtract this one. Look carefully at the example and you can do it!
Use your paper and pencil to find the answer.

Type your answer in the box.

300
-232

Example

step1-sub400g.gif (2509 bytes)

This one is a little tricky. Look to be sure you need to regroup.

You still need to use your paper and pencil.

                                                    300
                      -140

Click on the button if you need help.

Are you still using your paper and pencil?
Good!

Click on the button if you need a hint.

Now subtract this one. Regroup exactly the same way. Don’t let all those zeros trick you.

5,000
- 232

You win the prize as the Zero Hero!