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01Number of Squares Unit
Material Base-ten blocks
CMath Vo abulary place value: the value of a digit according to its place in a number
2 Write the numbers in the blanks. 2c. Have students understand that 0
represents the tens place in 108.
a 7 hundreds b 5 hundreds c 1 hundred There is 1 base-hundred block and 8 ones
0 ten blocks. What number does 1 base-hundred
2 tens 9 tens 8 ones block represent? 100.
1 one 0 ones Write 1 in the hundreds place. What
108 number does 8 ones blocks represent? 8.
721 590 (Write 8 in the ones place.)
How many tens blocks are there? None.
d In 475, e In 548, What do you write in the tens place? We
can write 0 in the tens place.
the digit in the hundreds the digit in the hundreds place, What number do all the blocks represent?
place, ( ), represents ( ). ( 5 ), represents ( 500 ). 108.
the digit in the tens place, the digit in the tens place,
( 7 ), represents ( 70 ). ( 4 ), represents ( 40 ). 3. Have students write numbers in different
the digit in the ones place, the digit in the ones place, forms. Guide them to use correct place values.
( 5 ), represents ( 5 ). ( 8 ), represents ( 8 ). 256 can be written as two hundred fifty-six in
word form and as 200 50 6 in the
3 Numbers can be shown in different forms. Circle the correct expanded form.
Remind them that when writing a number in
number. Cross out and correct the incorrect number. standard form, they must write the first digit of
each place value.
a 256 b 401 c 723 Common Errors:
Guide students to write 256 correctly.
Two hundred sixty five Four hundred ten Seven hundred 256 ( ), 200506, 20056, 2506 ( )
Four hundred one twenty-three Have students write 401 as four hundred one
Hundreds Tens Ones Hundreds Tens Ones in word form and as 400 1 in the expanded
Hundreds Tens Ones form. Even though 0 is in the tens place, have
them realize that its real value is 0.
5 26 4 01 7 32 3
200+50+6 400+10+1 700+30+2
0 20 3
1. Number of Squares 9
Digits and Their Place Values
10 times 10 times Write 204 on the board to explain the following points.
From the right, you have the ones place, tens place, and hundreds place.
204 The digit 4 represents 4 ones, 0 represents 0 tens, and 2 represents
2 hundreds.
As you move from right to left, the value increases by 10.
Hundreds Ones When reading a number, do not read the 0. For example: 204
Write 234 and 527. Compare the two 2s in both numbers. Explain that the 2s
Tens
represent different values in each number because they are in different places.
In 234, the digit 2 is in the hundreds place, so it represents 200. In 527, the
digit 2 is in the tens place, so it represents 20. Therefore, the digit 2 in 234
represents a bigger number. 2A Unit 01 011
Material Base-ten blocks
CMath Vo abulary place value: the value of a digit according to its place in a number
2 Write the numbers in the blanks. 2c. Have students understand that 0
represents the tens place in 108.
a 7 hundreds b 5 hundreds c 1 hundred There is 1 base-hundred block and 8 ones
0 ten blocks. What number does 1 base-hundred
2 tens 9 tens 8 ones block represent? 100.
1 one 0 ones Write 1 in the hundreds place. What
108 number does 8 ones blocks represent? 8.
721 590 (Write 8 in the ones place.)
How many tens blocks are there? None.
d In 475, e In 548, What do you write in the tens place? We
can write 0 in the tens place.
the digit in the hundreds the digit in the hundreds place, What number do all the blocks represent?
place, ( ), represents ( ). ( 5 ), represents ( 500 ). 108.
the digit in the tens place, the digit in the tens place,
( 7 ), represents ( 70 ). ( 4 ), represents ( 40 ). 3. Have students write numbers in different
the digit in the ones place, the digit in the ones place, forms. Guide them to use correct place values.
( 5 ), represents ( 5 ). ( 8 ), represents ( 8 ). 256 can be written as two hundred fifty-six in
word form and as 200 50 6 in the
3 Numbers can be shown in different forms. Circle the correct expanded form.
Remind them that when writing a number in
number. Cross out and correct the incorrect number. standard form, they must write the first digit of
each place value.
a 256 b 401 c 723 Common Errors:
Guide students to write 256 correctly.
Two hundred sixty five Four hundred ten Seven hundred 256 ( ), 200506, 20056, 2506 ( )
Four hundred one twenty-three Have students write 401 as four hundred one
Hundreds Tens Ones Hundreds Tens Ones in word form and as 400 1 in the expanded
Hundreds Tens Ones form. Even though 0 is in the tens place, have
them realize that its real value is 0.
5 26 4 01 7 32 3
200+50+6 400+10+1 700+30+2
0 20 3
1. Number of Squares 9
Digits and Their Place Values
10 times 10 times Write 204 on the board to explain the following points.
From the right, you have the ones place, tens place, and hundreds place.
204 The digit 4 represents 4 ones, 0 represents 0 tens, and 2 represents
2 hundreds.
As you move from right to left, the value increases by 10.
Hundreds Ones When reading a number, do not read the 0. For example: 204
Write 234 and 527. Compare the two 2s in both numbers. Explain that the 2s
Tens
represent different values in each number because they are in different places.
In 234, the digit 2 is in the hundreds place, so it represents 200. In 527, the
digit 2 is in the tens place, so it represents 20. Therefore, the digit 2 in 234
represents a bigger number. 2A Unit 01 011
