Math- Home Links p.229
We've been working really hard on subtracting with regrouping and it can be a little frustrating. Here are the steps/lingo we've been using in class.
1. Look at the ones (the little bitties). Can you subtract them? If not, you need to regroup.
2. Knock on Mr. Tens door, "Mr. Ten, can we please take one of you?"
3. Cross out the number in the tens and replace it with one less. Mr. Ten breaks himself apart and gives 10 ones.
4. Cross out the number in the ones and replace it with the 10 ones PLUS whatever was already there.
5. Now subtract the ones.
6. Look at the tens. Can you subtract them? If not, you need to regroup.
7. Knock on Mr. Hundred's door, "Mr. Hundred, can we please take one of you?"
3. Cross out the number in the hundreds and replace it with one less. Mr. Hundred breaks himself apart and gives 10 tens.
4. Cross out the number in the tens and replace it with the 10 tens PLUS whatever was already there.
5. Now subtract the tens.
6. Subtract the hundreds.
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