facebook Place Value: Ones & Tens Math Lesson Plan | Grades K-2 | Reading Discussion
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Place Value: Ones & Tens
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…

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.

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.

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.

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.

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.

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.

PLACE VALUE: ONES & TENS VOCABULARY

Place Value
The value of a digit based on its position in a number.
Base-ten blocks
Blocks that can be used to represent the number of tens and ones in a number.
Ones
A place in the place-value system that has a value of 1. In the number 23, 3 is in the ones place.
Tens
A place in the place-value system that has a value of 10. In the number 23, 2 is in the tens place.
Digit
Numerals from 0 to 9 that form part of a number.
Groups
Objects that have the same attribute are put together to form a group. For example, in the place-value system, 7 ones can be put together in a group of ones.

PLACE VALUE: ONES & TENS DISCUSSION QUESTIONS

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

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.

[Show students 3 tens blocks and 4 ones blocks.] Write the number that the blocks represent. How do you know?

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

How can you represent 63 with the base-ten blocks?

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

What is the value of 4 in 47? How do you know?

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

What number do you get when you add 1 to 29? Explain.

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.