What number?
Tens and Ones
Base 10 Blocks
Expanded Form
One more / one less
10

0 tens

1 one 

1

10

How many tens and ones are in the number "18"

1 ten and 8 ones

10

lll

30

10

What is the expanded form of 53?

50 + 3

10

What is one more than 71?

72

20

2 tens

9 ones

29

20

How many tens and ones are in the number "63"

6 tens and 3 ones

20

lllll........

58

20

What is the expanded form of 12?

10 + 2

20

What is one less than 89?

88

30

4 tens

8 ones

48

30

How many tens and ones are in the number "52"

5 tens and 2 ones

30

ll....

24

30

What is the expanded form of 77?

70 + 7

30

What is one more than 85?

86

40

10 tens

2 ones

102

40

How many tens and ones are in the number "90"

9 tens

40

lllllllll.

91

40

What is the expanded form of 38?

30 + 8

40

What is one less than 31?

30

50

9 tens

90

50

How many tens and ones are in the number "75"

7 tens 5 ones

50

lllllll

70

50

What is the expanded form of 85?

80 + 5

50

What is one less than 41?

40

M
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