Compose and Decompose 2 Digit Numbers

Front

How many groups of ten are there in the number 99?

Back

9

Front

These blocks represent the number ____ (55, 56, 46, 416).

Back

56

Front

How many groups of ten are there in 82?

Back

8

Front

What number does 8 groups of ten + 13 ones represent? (Use your manipulatives)

Back

93

Front

What is the value of 4 in the number 41?

Back

40

Front

What is a two-digit number?

Back

A number that has two digits, like 23 or 56.

Front

What does it mean to decompose a number?

Back

To break a number into smaller parts, like 56 into 50 and 6.

Front

What does it mean to compose a number?

Back

To put together smaller parts to make a larger number, like 50 and 6 to make 56.

Front

How many tens are in the number 70?

Back

7

Front

If you have 3 groups of ten, what number do you have?

Back

30