2-digit place value
30+40=70
How many tens are in 30?
3 tens
100+50=?
150
1+1=2
What is this called?
Number Sentence
If I have 2 quarters how much if the value?
50 cents
20-30=?
10
45+50=?
95
120+10=?
130
Subtract
If I have 4 quarters how much do I have?
1 dollar
90-30=?
60
50+80=?
130
150+250=?
400
If a problem asks for the sum what do you do?
Add
$4.00c
What's wrong with this?
80-75=?
5
90+20+10=?
120
200+100+50=?
350
If the number is too small to subtract from, what do, we do?
Barrow
How would you write 50 cents in DDC form?
$0.50
50-10-20=?
20
95+50+26=?
281
150+60+15=?
225
If the number is too big that we carried where do the other half of the number go to?
It's neighbor
If I have 5 dollars and my friend needs 2 dollars how much would I have left? Write it in DDC form.
$3.00
90-66-15=?
9