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Place Value: Ones & Tens
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 We'll learn about place value with ones and tens!
 We will also learn that any 2 digit numbers can be broken down into groups of tens and ones.
 And we'll explore how this knowledge can help us make tie dye shirts, pack for a picnic and even finish an art project!

Discussion Questions

Before VideoHow can you show 10 and 2 with counters in ten frames and in a number bond?ANSWER

Two tens frames, one with 10, one with 2 objects. A number bond showing 12 as the whole and 10 and 2 as the parts.

Two tens frames, one with 10, one with 8 objects. 10 + 8 = 18.

Two tens frames, one with 10, one with 4 objects. A number bond showing 14 as the whole and 10 and 4 as the parts.

Two tens frames, one with 10, one with 7 objects. 10 + 7 = 17.

The 1 means 1 ten, and the 6 means 6 more.


After Video[Show students 5 tens blocks.] Write the number that the blocks represent. How do you know?ANSWER

The blocks show 5 tens. 5 tens is 50. The number 50 has a 5 in the tens place and a 0 in the ones place.

The blocks show 3 tens and 4 ones. The number 34 has a 3 in the tens place and 4 in the ones place.

63 has 6 tens and 3 ones. I can show 63 with 6 tens blocks and 3 ones blocks.

4 tens or 40; 4 is in the tens place, so its value is 4 tens or 40.

29 is 2 tens and 9 ones. 1 more one makes 2 tens and 10 ones. 10 ones is the same as 1 more ten. That gives me 3 tens. 30 is 3 tens. So the answer is 30.



Vocabulary

Place Value
DEFINE
The value of a digit based on its position in a number.

Baseten blocks
DEFINE
Blocks that can be used to represent the number of tens and ones in a number.

Ones
DEFINE
A place in the placevalue system that has a value of 1. In the number 23, 3 is in the ones place.

Tens
DEFINE
A place in the placevalue system that has a value of 10. In the number 23, 2 is in the tens place.

Digit
DEFINE
Numerals from 0 to 9 that form part of a number.

Groups
DEFINE
Objects that have the same attribute are put together to form a group. For example, in the placevalue system, 7 ones can be put together in a group of ones.

Place Value
DEFINE

Reading Material
Download as PDF Download PDF View as Separate PageWHAT IS PLACE VALUE?Numbers have one or more digits. The digits in 43 are 4 and 3. Place value is the value of a digit based on its place in the number.
To better understand place value…
WHAT IS PLACE VALUE?. Numbers have one or more digits. The digits in 43 are 4 and 3. Place value is the value of a digit based on its place in the number. To better understand place value…LET’S BREAK IT DOWN!
Identify the tens and ones places in numbers.
The 1 in the number 12 is in the tens place. The 2 in 12 is in the ones place. 95 has a 9 in the tens place and a 5 in the ones place.
Identify the tens and ones places in numbers. The 1 in the number 12 is in the tens place. The 2 in 12 is in the ones place. 95 has a 9 in the tens place and a 5 in the ones place.You can break numbers into tens and ones.
The number 14 has a 1 in the tens place. It has a 4 in the ones place. There are 1 ten and 4 ones in 14. 27 is 2 tens and 7 ones.
You can break numbers into tens and ones. The number 14 has a 1 in the tens place. It has a 4 in the ones place. There are 1 ten and 4 ones in 14. 27 is 2 tens and 7 ones.There are zeroes in numbers.
0 is an important number. The zero in 20 tells us that there are no ones. That helps us know that the 2 in 20 is in the tens place. 20 is 2 tens and 0 ones.
There are zeroes in numbers. 0 is an important number. The zero in 20 tells us that there are no ones. That helps us know that the 2 in 20 is in the tens place. 20 is 2 tens and 0 ones.Compare 46 and 64.
46 has 4 tens and 6 ones. 64 has 6 tens and 4 ones. 46 and 64 have the same digits but have very different values. The place of a digit shows its value.
Compare 46 and 64. 46 has 4 tens and 6 ones. 64 has 6 tens and 4 ones. 46 and 64 have the same digits but have very different values. The place of a digit shows its value.79 and 1 More.
Suppose you have 79 crackers. That’s 7 tens and 9 ones. You add another cracker. Now there are 7 tens and 10 ones. 10 ones is the same as 1 ten. Then you have 8 tens. 8 tens is 80. There are 80 crackers.
79 and 1 More. Suppose you have 79 crackers. That’s 7 tens and 9 ones. You add another cracker. Now there are 7 tens and 10 ones. 10 ones is the same as 1 ten. Then you have 8 tens. 8 tens is 80. There are 80 crackers. 
Practice Word Problems

Practice Number Problems

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Science & Math$_{/yr}

Science Only$_{/yr}
[Show students 5 tens and 2 ones in baseten blocks.] Write the number that the blocks represent.
Represent 45 with baseten blocks. Draw a picture.
What is the value of 6 in 61? How do you know?
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