Base 10
What is the name of the base 10 model that represents/shows ones?
Unit
What number do we use as a placeholder?
Zero
True or false: we use words to represent numbers in written form.
True
What is this number represented by expanded form?
300+20+9
329
How many tens are in the number 721?
2, which equals 20
What is the name of the base 10 model that represents/shows tens?
If we have a set of dogs that have four heads, what would this set be called?
an EMPTY set.
Use written form on the whiteboard to show the number 11.
Eleven
True or false, the following number is in correct expanded form: 300+70-4
False! There needs to be the "plus" or "addition" symbol between each value.
How many ones are in the number 30?
zero
What is the base 10 model that represents/shows hundreds?
Flats
The number is eight hundred, nine. Write this on the board with a correct placeholder zero.
809
The written form of 207 is two hundred, seventy. True or false?
False. It should be two hundred, seven.
Use the whiteboard to show the number 286
200+80+6
8, in the number 843, is in which place value position?
Hundreds
Cubes
True or false: the number 1,035 has a zero as a placeholder in the hundreds place.
True!
Use the whiteboard to show the number 492
Four hundred ninety-two
Is this correct expanded form: 1+20+100
No! It should be 100+20+1 if we want to represent 121
True or false: tens and tenths mean the same thing.
False! Tenths is used when we talk about decimals (e.g. 0.5) Tens is used for natural numbers (e.g. 20) to the left of a decimal
What is the number represented by the base 10 model drawn by Ms. B on the board?
1006
If I have the number one thousand, five hundred, twenty. Which place would the zero be in (Thousands, Hundreds, Tens, or Ones)?
What is the number represented by the following words:
one thousand two hundred
1, 200
What is represented here?
1000+500+3
1,503
What are the four places in the place value chart that we will talk about in grade 2 (from right to left)?
Ones, tens, hundreds, thousands